I completely disagree. I said several times last year that the plus turnovers our defense got us was the difference of 10-3 vs 8-5 or 7-6. I'm not going to revisit the statistics, but it goes a little something like this:
Our defense averaged nearly 3 turnovers per game. If they got 1 less turnover per game, We lose to FSU, GT, and UNC. Last year Rosier was good at times, but his inconsistent play caused too many games to be close ones. Fortunately, we won the close games. That's no guarantee it will happen again next season. We have to have consistent play from the QB position.
I believe Perry or Williams could win the same number of games as Rosier. They have more upside and higher ceiling.
Rosier will probably start vs LSU. If he starts poorly, I expect Perry and /or Williams to get an opportunity. That will happen throughout the season. Rosier will NOT get 2nd chance opportunities after poor performances during the game. Whomever has the hot hand will play.