Not Much.  This team has improved, but has a few very serious weaknesses holding it back.  Pass blocking is poor, WR's can't get separation vs man, & the short yardage run game is an issue on offense.  Defensively, this defense can't stop the run if the opponent is 2 dimensional or has a running QB and doesn't generate much of a pass rush.  In other words, athleticism, and size at a few positions. 
Maybe DH got a little bored trying to play like Iowa/Minnesota after 2 quarters last night.  It was working to perfection up until the DR fumble however. 
He's obviously not ready, but last night was a game this team really could have used the Carter Nelson that was recruited.  I find it hard to believe Barney isn't more of a matchup problem in the slot, but their CB's put on a clinic of how to play man last night.  If NU ever had a receiver even get half a step by them last night, I didn't see it.  I know Coleman had injury & work ethic issues, but NU really could have used a physical WR capable of winning deep last night.  The back shoulder moon ball fades just don't look like good football to me.  Surprised Clark isn't a better option in those situations where the ball could at least be up and not behind.