Again, not disputing if they were the right choices, but they had two totally different circumstances involved. When AJ was competing, Alabama was a run it down your throat and defense will fix any mistakes that the offense does make kinda team. AJ vs P. Sims was an easier situation because it came down to who could make less mistakes and learn the offense better. The pressure of getting outpaced by a high scoring team was also never a worry in 2011.
Sims vs Coker is vastly different. You have a defense that just gave up 600 yards to aTm , blown out of the water by Stoops,and had trouble with Malzahn's gimmick offense. The margin of error from a qb was not really big. Coker and Sims are identical when you think about it. They both had problems early on at staring down receivers and some bone headed decisions. The difference is Sims's speed and his chemistry with the team. It also helps that Amari is there to bail him out if he gets in trouble.
As for this year, I truly believe that Cornwell was viewed as the number 2 guy if Coker faltered and Barnett was a number 3 or 4 guy. But Cornwell fell off the end of the earth, and Barnett is just not there. So by default Coker should be the guy for better or worse right? Wrong! we play around with Bateman and Morris who were never truly considered to be starters in the first place, and we have Coker constantly looking over his shoulders thinking each mistake could cost him. The idea that Morris and Bateman could potentially start probably should've ended when Coker got 95% of the snaps in a pretty impressive win over Wisconsin, but for whatever reason it didn't. You are probably thinking "Well Blake wasn't clearly the man until Florida", but the immediate counter will be Blake had 3 games against lesser competition to distance himself from Coker, while Coker had 2.
As far as the defensive argument, you also talking about betting the house on us stopping 1 petrino led Arkansas, 1 PSU power team, and 1 LSU team in 2011, while betting the house against a talented Ole Miss offense, Chubb, Fournette, Sumlin with some ammo, and a few HUNH offenses right now. We could afford to make some mistakes and get away with it in 2011, but this year mistakes are going to add up.
My point has never been was there an obvious choice, but rather that an in season qb competition is always not the way to go. I just hope it doesn't bite us by December.