The mobility issues for DR might be a problem, but it was exacerbated by our inability to block. If you put him behind a good line and give him good receivers (like he'll have at Oregon), he is going to shine. I would say that there were some decision making issues that will carry over, but I think overall he'll excel moving forward as long as he stays healthy. I don't necessarily think he'll be an NFL Hall of Famer, but he has the tools to be a really good QB.
I do think that there is a significant question about what our ceiling can/should be as a program in this current climate of college football. Pelini-era you were looking at 9-10 wins a year, but a lot has changed in that time. The conference is tougher, recruiting is a money driven arm's race, and we've got a decade of despair dragging behind us. If we could have pulled out that USC game where DR got hurt, we would have been at 8 wins, which felt about right for the talent we had.
I still stand by the assertion that we should be at least as good as Iowa/Wisconsin, but I think we've reached a point where our ceiling is moving further and further away from title contender. 7-10 wins a year feels like the sweet spot for us. Granted, with playoff expansion 10 wins gives you a shot. I just seriously question if another coaching change does much to move the needle. I know people will point to what happened at Indiana, but do we continue to roll the dice on coaches until we strike oil like they did?