>>48594321It just all around fucks up the endgame.
Sure there would be strategies and skill involved in the early and mid game to get rid of counters and such. But the end game doesn't really have a wincon, if you do everything right and you rely on a 30%OHKO move in the endgame the rest of the game hardly matters, it still comes down to luck in the end.
That's not to say wincons are 100% guaranteed to result in a win, you can always get screwed over by what luck is in the game, like missing a 90% move or being hit by a crit. However those situations are few and you're usually rewarded for playing well.