I hope changing from a decentralized feudal state to a centralized empire isn't as simple as just pulling a slider. In reality, centralizing the state was a big challenge for monarchs and they often got strong resistance from the nobles and often the clergy and peasntry as well. Same thing with democracy- I think there would be some problems if China could just instantly go from what it was to a free democratic state, and an English King would definitley meet strong resistance if he tried to turn England into an absolute dictatorship. Before the French revolution, most change of this time period happened gradually, and hopefully the game will reflect that.