I think there is a lot of truth to this. Seems to be a very reasonable take.
The takes that BB is still pissed at Mac, or BB does not support Mac, seem over the top to me. Mac could have been a lot better, Zappe is a good, hard working kid with talent, so BB wants to see if Mac can turn the emotional corner and mature before committing to Mac. Even Saban talked about Mac's emotions while at 'Bama. And we all saw the over-emotional and unprofessional Mac on the field last year - nothing too bad, but something that has to be corrected. Mac does have to buy in, through good and bad, to be successful. That was one of the great things about TB12 - he bought in even though some fans thought he bought in too much.