There are some ongoing arguments where you have to be saying to yourself - am I really still arguing about this? Can’t you suffice it to say that the cumulative effect of all of the above from the 3-pass game to the rotating coordinators to the speculated poor relationship with BB, to the porous offensive lines and weak receiving corps, etc have led to a pretty shattered confidence and the need for Mac to rebuild his career elsewhere? You can’t know for sure what impact every detail has had on Mac’s brain - but the bottom line is what it is and I don’t see anyone at this point disagreeing with that.
I agree totally with this bottom line that Mac has lost all confidence or mojo or whatever and is currently not mentally positioned to be an NFL QB. There are lots of factors that have led to this but I put it mostly on Mac. Saban even said recently that he had issues or questions about Mac's mental make up or mental toughness back at Alabama. It was not always the case; there have been periods in his NFL career where he as looked good, but that is not the case right now. His mind is not even close to where it needs to be to be an NFL QB.
I think Zappe's mindset or whatever is much better but unfortunately, I don't believe he has the overall talent to be an NFL starting QB. We'll see over the next few games I guess. I see no reason to play Mac any more this season. I don't think it is going to fix him, if he can even be fixed, and at this point, I hate to say it, but who wants to win any games anyway? Let's role out Zappe and Cunningham and see if by some miracle, one of them plays like an actual NFL QB, something to build on for next season.
Mac meanwhile should consult a sports psychologist in the off season (I say that with all seriousness), try to get his head back in the right place, and pick things up next season. I doubt very much that this is the end of his NFL run. There is still NFL talent there, we have all seen it along the way. He will get more opportunity, in NE or elsewhere.