I see where you're going with that, but in Braxton's defense, this past season he completed 63.5% of his passes and was top 15 in QB Rating. To reach your elusive 66%, he only needed 6 more completions tacked on to his 162. If he plays against FAMU or Cal, I think he's there easily in %. I don't think he's reached his potential, by any stretch of the imagination, so I disagree with your "It's most likely not gonna happen" thought.
All that said, I wouldn't be opposed to a pass-first offense, if that's where our talent and coaching leads us.