I have to admit I've never played this game as vanilla. As soon as I bought it I did a seach for ETW mods and grabbed IS right off the bat and played it until TROM grabbed my eye.
Anyway in both IS and TROM I've found it annoying how I'm always unable to build the very last of a minor towns governors palace of military barracks while the AI to..
Is this a vanilla bug or what? I can understand being unable to build the final happiness structure of government building in the capital region of a faction but I'm unable to full max out Yerevan for some reason?
As it is now I have to sit back and wait for, say the Ottomans to build a Sublime Porte in a region before I take it because if I don't then that region is stunted forever after.