One could argue that Hendrix and Golson regressed under his leadership. Hendrix was unable to complete a simple out pattern under Kelly (couldn't even get it there on the fly) yet he posted fairly big numbers on a terrible team this year. By USC, Golson was so beaten down by Kelly's rants that he was throwing the ball far wide of defenders (and WRs) for fear of a turnover and the next rant.
Kelly's philosophy to date has been that his system (14 passes out of first 15 plays vs USC) is perfect and the QBs keep screwing it up. Perhaps the balanced attack in the bowl game (although the RBs averaged less than 4/carry) will help Kelly to realize that the QBs will be more effective if ND has a strong ground attack.