This is actually a sharp observation. Saban loves to have an agressive, blitzing defense, but against a short route, quick passing game, it's not as effective, and having those linebackers or corners stay in at their assigned part of the field (in a zone), would mitigate this some, allowing more pressure from just the defensive line.
My strategy would be to let him stay in the pocket and force bad throws to covered receivers, at least at first. I would think that Petrino and company would be so prepared for a hard charging blitzing bama defense, that they've already made plans to do a lot of short crossing routes or curls, in order to get the ball out quickly. I wouldn't think Arkansas would attempt to run the ball much at all, what with one of their main RB's nicked up and it's not much of a running attack to begin with.
Good observation though. Chicks that dig football rock.