The biggest change from last year, IMO, is the departure of Jerry Glanville as the defensive coordinator and the return of Greg McMackin to replace him. UH is going from a blitzing 3-4 to a more consistent and, hopefully, effective 4-3.
I think the offense should pickup where it left off last year. If the defense can be strong against the run and get the ball back to the offense, then Colt, his new haircut and UH should have a good season.