I agree with you. Some things improve - some things break 
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Update Preview 14.0.4963 will bring improvements to AI behaviors :
AI Updates
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AI players will now have increased defense for their or their allies’ wonders.
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Hard AI and higher will now retreat in a more efficient manner.
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Fixes for AI upgrades research:
- Lettre de Change (Knights Templar)
- Treasure Towers (Knights Templar)
- Templar Brother (Knights Templar)
- Cistercian Abbeys (Holy Roman Empire)
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When playing Nomad mode, AI monarchs will now correctly path towards their corresponding Town Center in early game.
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In early Nomad mode, vulnerable AI monarchs will now attempt to flee if attacked.
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Holy Roman Empire AI players will now train Black Rider units.
Map-Specific Changes
Waterlanes
*AI players will now correctly transport villagers to other islands.
It is not for nothing that I as well as many players reported about AI bugs and errors, the developers are slowly trying to fix them 
Please report all bugs and problems in the behavior of the AI, which you notice it is very important and it helps in further improving the behavior of the AI.
nice that the devs are keeping up at least
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I agree, but I would like more
Update 15.1.6970 brought us some new changes and improvements to AI behavior. There aren’t many changes, but I think the developers, as always in global patches, are making a lot of AI changes that are not described in the patch notes. Also, the Dynasties of the East DLC will be released soon, and perhaps something else will be improved 
AI Update
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AI is now more effective in Full Moon game mode.
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AI players will now take more conservative paths towards their enemies’ Wonders.
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AI fishing boats will now attempt to flee or garrison when threatened.
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AI villagers will not go idle anymore if two or more fishing boats go idle.
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AI players will now trade more efficiently on naval maps.
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Fixed a rare issue for AI units oscillating between attacking landmarks and buildings around them.
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AI players will now progress more smoothly when spawned close to enemies.
P.S
I wanted to write a little, but I haven’t been on the forum for a long time and I’ve accumulated quite a bit
I wanted to thank everyone who wrote about bugs and strange AI behavior. Developers have fixed many issues over this long period of time, which I and many other people reported in my thread and other similar threads on the forum. Thanks to us, many players who like to play with AI can enjoy better gameplay and, in principle, get more pleasure from playing with AI, and there are many such players - very many
If you come across any old AI bugs or find new any yourself, please create a thread on the forum or describe and leave information about the bug here with screenshots and a description of the problem, and it’s best to send your bugs here as well https://support.ageofempires.com/hc/en-us/requests/new[spoiler]because through the support service you will receive a 100% response and a guarantee that the bug will be fixed, while on the forum this does not always work, unfortunately 
There are still many problems and errors in the AI’s behavior, and I hope the new DLC won’t bring even more of them :D, but a huge amount of progress has been made from the old release version of the AI to the present.
I would also like to highlight @JakcieChan1178, who does fantastic things with AI using his mod, and without his mod, I think I would have stopped playing the game so often a long time ago
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its been many years , they wont improve AOE4 anymore , the game is over .
Aren’t you bothered that new DLC is coming out in a few days? 
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New season, new DLC, AI fixes (that VisionedTuba pointed out in their post).
Are we meant to take this comment seriously, or is there some other meaning?
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yeah AI is better than ever but still having issues
Like being its movement bugged on Wololo cast
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Some AI bugs in the new patch (15.1.6970)
I’ll update this list as I discover new AI bugs and oddities
AI:
After the latest update, AI Hardest difficulty and above (Ridiculous, Outrageous, and Absurd) builds far fewer military production buildings than before. Basically, one siege workshop and maybe two or three barracks/stables/shooting ranges. However, this isn’t enough to replenish its troops after losses in the late game, so even with a lot of resources, the AI simply loses due to a lack of troops.
House of Lancaster AI :
Never builds the maximum number of Manors. Generally, the AI builds a limited number of Manors, ranging from 5 to 8 maximum, although the maximum limit is 11.
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Surprisingly, there are almost no new AI bugs and about 70% of the old ones have been fixed 0_0
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Thank you for your time and support
This is very much needed!
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Do AI actually play a full game now and not sit mostly idle after about 10 minutes? MP, 2 v 2AI
Hardest AI and above seems to build way fewer military production buildings than before after the latest patch. I’m assuming this is a bug, but they’ll only build 1 siege workshop and maybe 2-3 barracks/stables/archery ranges
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Yeah, I noticed that too. The AI has a lot of resources, but it just can’t keep up with the losses troops
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Oh wow, that’s awesome.
I heard they still struggle with ships on ponds.
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All the bugs I’ve found in the new DLC. There are probably more of them there, and I’ll keep playing with the AI to discover the maximum number of errors and bugs.
All AI civ:
After the latest update, AI Hardest difficulty and above (Ridiculous, Outrageous, and Absurd) builds far fewer military production buildings than before. Basically, one siege workshop and maybe two or three barracks/stables/shooting ranges. However, this isn’t enough to replenish its troops after losses in the late game, so even with a lot of resources, the AI simply loses due to a lack of troops,
For some reason, the AI doesn’t age up for 10+ extra minutes (this doesn’t happen very often, but it does happen),
All AIs use the Meteorite for resource gathering, but the AI does not prioritize Meteorites, and instead mines stone and gold on the map, although extracting resource from the Meteorite and protecting it would bring the AI more benefit.
House of Lancaster AI :
Never builds the maximum number of Manors. Generally, the AI builds a limited number of Manors, ranging from 5 to 8 maximum, although the maximum limit is 11.
Golden Horde AI:
Often Golden Horde AI not aging up for quite a long time, even longer than other civilizations,
For some reason, the AI also does not use Double Broadax technology, although it is standard for almost all civilizations.
AI doesn’t research Ovoo Offering and Ovoo Ceremony and thus becomes significantly weaker due to lower stone income. The stone is very important for this civilization,
AI doesn’t use Archery Range, Barracks, and Stables Reinforcements, which greatly slows down the AI’s attack speed and troop recruitment. This is a very important technology for the Golden Horde,
AI does not use Beachhead technology and doesn’t use Rams ability to make a defensive point from it,
AI does not use Glorious Charge technology and the Glorious Charge ability itself,
AI does not use Khan Debuff Arrow technology or the ability itself,
AI does not fully utilize the Relic Ovoos correctly, since even with additional Relics, the AI still does not build additional Relic Ovoos, and the AI does not even build the maximum number of Ovoos that are available after Age up,
AI does not use Triple Shot technology and does not hire Kipchak Archer, nor does the AI upgrade Kipchak Archer.
Macedonian Dynasty AI:
AI often places the Varangian Warcamp incorrectly, especially on water maps. Yes, the AI tries to place the Varangian Warcamp near the water on the shore, but it very rarely succeeds, because of this, the AI cannot hire ships,
AI doesn’t use the Cistern of the First Hill Landmark it still has 9 charges, although the AI should use them to increase the work rate of military and research buildings. Unfortunately, this Landmark is completely useless for AI without a fix,
AI doesn’t use the Palatine School Landmark and also doesn’t recruit Elite Cataphracts, this Landmark is also useless for the AI without a fix,
AI does not hire Huihui Pao, Nest of Bees and Royal Cannon from Foreign Engineering Company Landmark is also currently useless for AI Landmark without fix.
AI does not use Runestones from Atgeirmaðr, Bogmaðr, Varangian Guard and Riddari Knight to buff units,
AI does not use: Riddari Knight - ability Throw Axe, Bogmaðr - ability to Bypass Armor , Varangian Guard - Berserking ability,
AI does not use Liquid Explosives technology,
The AI doesn’t use Cataphract’s Trample ability, I already described this a long time ago - it still hasn’t been fixed.
Sengoku Daimyo AI:
AI uses Yatai strangely. Sometimes the Yatai AI moves from one resource point to another without reason. Then, when the AI researches the Yatai Farm Gather technology, instead of placing Yatai near its farms for passive resource income, the AI does nothing with the Yatai; they simply stand in the places where deer or boars used to be. The AI also often abandons Yatai at the site of resource points and no longer uses them. It’s also necessary to increase the number of Yatai used by the AI (so that the AI uses all), as there are quite few of them, and in the late game the AI has none at all; unfortunately, the AI stops using them, even though they are very useful for placement near farms with their bonus. In fact, Matsuri is currently simply broken for AI and does not provide adequate bonuses and advantages,
AI Sengoku Daimyo has a rather strange initial build, because of this the AI has no wood for further buildings and the AI mines gold only with workers without a Forge.
In short, at the very beginning, there’s some slightly incorrect build order. The AI gets wood, but time is already lost and the AI falls behind in growth,
AI does not use Koka Township Landmark and its abilities Scout a target area and Shinobi ambush, without fix it is useless,
Tughlaq Dynasty AI:
Often Tughlaq Dynasty, as well as Golden Horde AI, do not age up for quite a long time, even longer than other civilizations,
AI very often leaves Worker Elephants idle, it’s cool that AI hires the maximum number of Worker Elephants (20), but AI often leaves them in different places on the map without work. Worker Elephants often stand in the place where resources used to be. I also noticed that when the AI leads an army into battle, it takes several Worker Elephants with it, but why, since the AI doesn’t use the Field Repair Site ability. There are often situations when a Worker Elephant is standing not far from villagers who need to bring resources somewhere, but the villagers carry them to the Town Center over a very long distance; also, Worker Elephants frequently do not approach villagers when they are needed. I’ve noticed that in the late game, the AI often leads almost all of its Worker Elephants in the Tughlaqabad Fort and they just stand there also, I’ve seen multiple times that the AI leaves several Worker Elephants near the Town Center even though they are clearly not needed there,
AI does not use Governor Ajmer (defensive).
AI does not upgrade defensive weapons such as Springald Emplacement and Cannon Emplacement in Tughlaqabad Fort.
AI often uses the bonuses from Tughlaqabad Fort incorrectly. For example, when the AI use Governor Bhakka, which specializes in a Food bonus, there are no farms near the Tughlaqabad Fort. Also, for example, Governor Jalor specializes in Cavalry training, but there are no Stables near the Tughlaqabad Fort, just as there are none near the Tower of Victory Landmark if it is present. This also applies to the Palace of the Sultan Landmark, as the AI also doesn’t know how to use all Governors correctly.
The AI does not use the Trample ability on War Elephants and Raider Elephants.
P.S. Unfortunately, with the release of the new DLC, for some reason Replays don’t work ,they simply aren’t saved, and because of this I can’t demonstrate screenshots of these bugs.
If you also find any bugs, be sure to report them to support—there’s a very high chance they’ll get fixed here: https://support.ageofempires.com/hc/en-us/requests/new
You can also create a new topic on the forum or describe the bug here, but the most effective option is still to write to support.
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