I’ve been doing some calculations and I think dojos are actually already rather strong in terms of un-upgraded villagers. The original video did things in terms of fortress-upgraded villagers which I think is good for comparing it to the 7 villager shipment, however I think it makes it hard to compare to eco upgrades like refrigeration.
For natural resources I used
Food: 0.67/s
Wood: 0.5/s
Coin: 0.6/s
For non-natural gather rates I used
Food: 0.5/s
Wood: 0.5/s
Coin: 0.31/s
Here is what I calculated dojos to be worth in terms of un-upgraded villagers
-----Yumi without upgrades:
6.8 vills on natural res
7.84 vills on non-natural res
-----Yumi with Shogunate + Kamidana (I included the -5% unit cost in my calculations)
9.9 vills on natural res
11.5 vills on non-natural res
-----Ashigaru without upgrades:
6.3 vills on natural res
9.75 vills on non-natural res
-----Ashigaru with Shogunate + Kamidana
9.2 vills on natural res
14.3 vills on non-natural res
-----Samurai without upgrades:
6.2 vills on natural res
10.2 vills on non-natural res
-----Samurai with Shogunate + Kamidana
9 vills on natural res
14.9 vills on non-natural res
-----Naginata without upgrades:
6.2 vills on natural res
10.2 vills on non-natural res
-----Naginata with Shogunate + Kamidana
9 vills on natural res
14.9 vills on non-natural res
-----Yabusame without upgrades:
6 vills on natural res
10.67 vills on non-natural res
-----Yabusame with Shogunate + Kamidana
8.8 vills on natural res
15.6 vills on non-natural res
For comparison an upgraded factory food/wood is worth 14.3 vills on non-natural resources and a factory on coin is worth 23.1 vills on non-natural resources (using the rice paddy gather rate).
If you have all 75 vills on food, refrigeration is worth 15 vills.
If you have all 75 vills on coin, royal mint is worth 18.75 vills.
So theoretically dojos are worth more villagers than these upgrades since you are not likely going to have all vills on one resource. Of course, dojos are less versatile than improved gather rates and all value is lost if the dojo is destroyed.
This leads me to personally think that the spawn rate of dojos probably doesn’t need a buff from the church or other sources. I think dojos are a lot more viable now since the unit queue pauses if you are housed now. Probably the only buff I think that could be good is a slight hp buff maybe to 3500-4000 hp. I think it’s annoying they are as viable for your opponent to siege as your barracks but I suppose that just means they have to be protected better.
Another conclusion I took is that while your vills are gathering from natural resources dojos producing yumi is producing the most value (as the video states) but when the mines run out, yabusames produce the most value.
I think I’ll try using them a bit on the ladder to see how they feel.