problem as the QB thing, but Tyson Lee should be better just because he has a year under his belt. Mullen will probably look to use one of your receivers somewhat like Harvin (yeah, yeah, I know Harvin is one of a kind, but it will add a little dimension to the offense). He'll probably start working in a new QB in a dual system by mid-season.
Bottom line is that you will be better, but it take another year for the OL to catch up.