After last year, Nebraska has to take the mentality that they can win any game, and lose any game, and that to give themselves the best chance they can is to respect that week's opponent and make them the object of their main focus.
My worry and my gut feeling suggests that Nebraska will drop a game it shouldn't at some point this year, just because they are still fundamentally unsound. If you have ongoing problems with turnovers and penalties, you are living dangerously in conference play, no matter how talented you think you are. It's been an old habit for this program for 10 years. I'm glad to see they are learning how to get past it and win in spite of it, but the law of averages would suggest that they can't get away with it every week.
I'm not saying it will necessarily happen against Northwestern, though it is a game that should certainly have our attention.