Mike Shula would be a sub-par choice for just about any college football program, unless he's managed to rid himself of the following behaviors:
-Excessive coddling of star players, coupled with mistreatment of players who see limited action
-Failure to succesfully implement and maintain an effective off-season strength and conditioning program
-Tendency to be very conservative, predictable and indecisive with offensive playcalling
-Less than stellar acumen for hiring and retaining quality coaching staff members
-Inability to maintain credibility when it comes to personnel/discipline issues
CMS personally did two things well while he was in Tuscaloosa: he and his staff managed to "coach-up" a couple of quarterbacks and turn them into modestly productive players, and he had decent recruiting success. Nothing on the level of Nick Saban and company, but not poor by any means.
A good bit of Shula's success in Tuscaloosa is directly attributable to Joe Kines and the defensive staff, and the job they did coaching up our defensive players. Shula basically let them have free reign as he knew relatively little about that side of the ball, and we fielded a competent - sometimes even dominant - defensive unit.