Just a small nitpick: I’ve read that the Slavs’ wonder is from the ~17th/18th century (out of AoE2’s timeline), back in the HD edition days Indians had the Gol Gumbaz as a wonder which is also a 17th century building and got replaced afterwards together with a new architecture set.
I don’t get why the Dormition Cathedral exists as a scenario building and not as the Slavs’ wonder…while still having the anachronistic Kizhi Pogost for them ever since they came out.
Because I barely have any modding knowledge and as far as I know some mods won’t work on campaigns and multiplayer after trying the Bohemian central European architecture mod.