I don't see the point of having 2tpy. We won't have the time to enjoy the game then. 4tpy means more time and opportunities for the AI, too.
I do hope that in EB2 we can mod the Imperial reforms to happen just a bit earlier, because I've had the patience to do them only once (and I didn't even move to the Middle East then). Usually I get bored before 150BC even without conquering a lot, mostly because of stack spam and constant autoresolves and retraining management.