Make coalitions form against a nation because it is powerful, not hated.
Ok I agree to some extent about this. But heres a problem, what about a major power that is passive? Lets say Ottomans expand and get all of the former Byzantine Empire borders, he may get coalitions at first from the muslim nations and Hungary/Austria. But once he gets his land, at that point he stops all wars and for the rest of the game is a passive huge empire. The only wars he fights is defending himself and alliances.. never taking any land. He should not be punished for being a passive empire.
But you make a good point about a powerful nations. A OPM who annexes a nation of 3 provinces, should not have all of the world after him.. hes already small as it is, but if he continues expanding at alarming and fast rate, then the player who rage quits when all the strong powers form a coalition at him deserves it.