Since the Mandate of Heaven Ming has become significantly over powered. Not only do they lead the world economically and militarily, but they also seem to never lose mandate. I have never seen them lose mandate in my many EUIV games. I am thinking that you should incorporate a troubled times system, where, at some point in time, perhaps 1500's Ming would have a troubled times era. In which losing the Mandate would be much more likely. Of course there is a chance that the ai could get out of it if they manage themselves properly. Another solution could be by fixing the institution system by incorporating westernization (from way back when) into institutions. Westernization would change how the tech system works and make it more sensible. Institutions would still be spawned and embraced however, as the game progresses, if you are not western you would get institution spread and cost penalties if you don't westernize. With this system Ming would naturally fall behind in tech like in reality instead of Ming always embracing (or being birthplaces of) institutions and being even further ahead in tech that Europeans because of their INSANE wealth (to buy advisers). I would like to add that the westernization system would fix a HUGE amount of issues with "primitive" nations being stronger than Europeans just because of a silly institution system. Institutions should remain the same however, westernization should be re-implemented (however improved, instead of the old and bad westernization system that would cripple your nation) so that the game can progress in a more natural, sensible, realistic, and balanced way. Westernization could be embraced through bordering a western nation and paying a certain amount of ducats (probably based on national income) and a certain amount of adm points. This would result in the West slowly surpassing the East in time. Say bye to Uber Ming every game!