I know people have said this time and time again, but it's a REAL issue. Not only are servers completely out of the question, but the freezing in single player worlds has gotten even worse. I remember the whole game stopping then it froze, but now, it still runs in the background while frozen. I've died to mobs repeatedly because of this. It really is unfair (I've cheated a few times to get my items back just because of how unfair it was) and I came here to say that this should be a top priority (among other things, obviously).