King of the Hill 2

Well, even a schoolchild understands that the restructuring affects trading... You just need to be able to play comfortably, not in a way where one player builds up to level 3, the other captures that castle, but can't build anything there if they have a library and have to sit there thinking about how not to break the rules... if you follow the rules...
Just make a tower with a ban on libraries, and trading will become interesting anyway, for example, if a dungeon tower appears.