Keep in mind that Braxton said he wanted to attend graduate school , not that he was going to attend graduate school. I realize there are many excited at the prospect of Braxton returning but keep in mind that his emotions are probably still running high after his injury and normally any decision made under the circumstances aren't the ones one sticks with. Besides, what else would he say ? Would anyone expect him to say " I'm leaving"? That would add an extra distraction to the season.
To be honest, the best thing for him , in my opinion, is to leave after this year and turn pro. His future was never going to be as a quarterback in the NFL for a multitude of reasons : skill set, injury history, stature, and ability to run a pro offense to name a few. Therefore, he should go ahead and leave and embrace that he is going to be a skill position player at the next level if he wants to have any length of a career. He's already gotten banged up so much that to come back for another year opens him up for further injury and not get paid for it. I realize that he wants to be a quarterback but some self awareness on his part at where he stands at being a quarterback in the NFL and another year older and opening yourself up to more hits and injury would be in his best interest.
If he comes back for another year he's going to be heavily scrutinized by the scouts for skill and injury and may have his draft stock pushed further down (4-5th round) or he can leave, switch to a skill position, and more likely be drafted in the second round where he'll have a more lucrative contract, make more of an impact on the field, have a chance at staying in the league longer, and have a chance at an extra contract.
I also think that with all the young skill guys that Urban has been recruiting , JT and Cardale getting all the reps in spring and fall camp , and an entire season of the skill guys building a rapport with JT that for the team the best thing could be for them to be building now for years to come with a core nucleus.