Lets's assume ND gets average defensive players. Maybe a great player here and there, but more on the par with hard hat and lunch pale type. ND can have a good defense, maybe not elite. That doesn't mean you can't win and win a lot. The bigger issue at the moment is the offense. I've said this all for a while. Kelly's offense is not good for his defense unless they score a lot of TDs. I think ball control, run oriented with play action pass would be a better fit for a team that has trouble fielding a very good defense. ND can get elite offensive players at all positions, especially lineman. Linemen love to run block and maul their opponent. Play that style and I really believe they can win year in and out and be in the hunt in most years.