I really wished they had made the diplomacy a little more complex, meaning a Nation could form some sort of faction or Alliance with 2 or 3 different nations or more. And get a bonus from it and possibly adopt a flag or symble within there newly created alliance. I guess thats a bit of a stretch cause currently you cant even request your allies to wag war on someone your at war with, sad they forgot that in the this game, it was in previous total war games, and I made plenty use of it