One could easily argue that has more to do with the OC of each of the QBs rather than the QBs themselves. Do you think AJ could bring a team back from being down by 20 with Kiffin as OC rather than Nuss or Mac?I think CNS would settle with Coker if he can have the Big Ben mentality of not letting mistakes go to his head.
Game mangers have their downside too. If we get behind big I have my doubts of us getting back into a game. I believe since 2008 to 2013 the biggest deficit we have overcame was 14-17 points. I have far more confidence of Blake overcoming a 20 point deficit than gmac and AJ.
Alec could be more than a game manager but it's yet to be proven. I'm fine with either Morris or Coker but I would say if Coker's mentality is stronger than what we presume then he probably is the better option.
As much as I like McElwain, I trust Kiffin in that situation more than the other two because they had tendencies to become too predictable.