Shatel described Adrian as "right guy at the wrong time". Which I think is a good way to describe him.
Had he come along to a program w stability among the coaching staff, stability on the OL, stability w RBs, stability w WRs... he probably would have been a 9-win a year guy. Problem was, he was initially going to Tennessee and he wasn't getting any of that there either.
The setup around was the worst possible thing for him. The most comfortable he ever looked ironically enough was his FR yr when Frost just basically plug-and-played the stability left over from Riley's regime around Adrian. The more Frost "built" his offense, the more unstable things got. Like the reverse Midas touch.