Landmark changes is the most interesting one so far
and since you made this topic i assume you are collecting feedback
i played since launch, tried all the civs
here some civs landmarks that needs buffs / reworks in my opinion
Ottomans:
fuedal landmarks are good early, but falls of use in lategame, they both need imperial upgrades to keep them interesting
Malians:
saharan trade network:
it a good landmark but i hate the fact u have to place it in a trade route early, which will cost you alot of walk time for villagers and economy, my suggestion is to remove the food collected at this landmark, and just give all other outposts a buff in food instead, say from 50% to 60-70% sounds good
both of their imperial landmarks feel underwhelming
English:
Abbey of the memes rework
Chinese:
never liked building imperial academy, just forced my self to do it to go to song dynasty
age 3 imperial palace is useless and need a rework as well
French:
id say royale institute needs a rework, i always prefer guild hall
HRE:
Meinwerk palace needs a bit of a buff to compete with aachen chapel
Mongols:
deer stones feels kinda useless since u can just research the tech in outposts
maybe make it give more movement speed like 20-25%
Kurultai: very underwhelming landmark, needs a rework
Khaganate palace: very underwelming as well, also need a rework / buffs
Rus:
Kremlin feels weak, usually everyone goes golden gate
Delhi:
dome of faith, produce scholars cheaper but way too slow, needs a little buff
Compound of the defender: needs something more intersting, maybe allow infantry to build keeps
both imperial landmarks are pure useless
and finally, my main, Abbasid:
as abbasid i always go economic wing → culture → military → trade
if you want players to change their play style id suggested buffing other 2
preservation of knowledge: it used to be 50% and i used to pick it, but now it nerfed i always go to eco wing
maybe make it 40% cost reduction and reduce the research time by 20%
Boot camp: choosing this means u will be aggressive, but it not as appealing as fresh food stuff
extra health is good enough, id suggest making military production buildings 50 wood cheaper to encourage players to choose this wing more, maybe even increase military production speed for infantry
one side note about the faith tech, i never used it, or even bother to research it, would be nice if this get reworked to make imperial intersting, maybe make imams give a buff to the army
anyway that my feedback with landmarks, hope it helps
take care