The thing about Levi is that he has a great O line, has excellent receivers and super stud RBs to play with. Being around that greatness can sometimes make him look like the weakest link especially when you consider he touches the ball on every play. So those who have to complain usually end up complaining about him.
Levi's play has improved a lot and looks much more seasoned since that MSU game and I think it will continue to improve. His best throws are crossing routes over the middle and the coaches seem to be calling more plays to take advantage of this and staying away from the throws he struggles with.