AJ was a 3rd year Soph. Also, he did not have the dramatic effect on the running game that Jalen does. That's not counting the intangibles, some of which AJ had. His response after the OM scoop and score was the most impressive sequence of plays I've seen this year. Led them to a TD so fast that it left time for Eddie's punt return. IMO, he was going to lead Bama to a win with or without the PR. Impressive impressive.
He may not play well at some point, but he has proven without a doubt that he can win against name opponents (USC) on neutral fields and in hostile stadiums (OM, Ark). Coming from behind or from ahead. IMO the entire team (O, D, ST) benefits tremendously from his calm, poised, competitive presence. He's amazing.