Holy crap, everybody, calm down... I know this is a generic response, but it's only a game. I understand that you all have your reasons to quarrel, but at the end of the day, it's the Dev's that have the say, the history, and the know-how of the base game, so, unless they don't make all or a part of Far East Asia playable and unlocked, this speculation is utterly undeserving of such an intense argument.
Personally, I don't see how CKII can ever be historical, from the year that you start your dynasty to the very last day, next to nothing will have happened that's actually historical besides pre-loaded wars and the History of characters long gone before the start of the game (this is without player interference, and even then, it isn't possible in some cases to be historically accurate). Perhaps the greatest "flaw" (for lack of a better word) of this game is that it is so damn accurate and detailed and so full of features that it screws over the accuracy of any game.
Remember; just don't flip out about this, there are more pressing matters in the world that deserve more attention and anger than this. Don't let him/her get to you.