Do you mean freezing without recovering from it? I haven't seen too many reports about it in the forums lately. Such a freeze/crash does happen occasionally, but not too frequently, I'd say. And my guess would be that this is usually caused by exhausting the player computer's resources, whether that be the CPU or the amount of free RAM at the moment of crash. (It's true, of course, that this game seems to use more resources than it could/should.)
When it comes to meter lags / jerky swing meter, a solution is to let the meter pass all the way to the right without clicking the mouse, then take another swing.