I have seen nothing from Nebraska's defense this season to think they have improved at all. They were 10 ply soft last year, and they're 10 ply soft now.
Our run game struggles are well documented, but our game against Illinois showed last week that we can hurt teams thru the air. Nate will have to be solid, but based on his comments I don't think he fears Memorial Stadium all that much. After reading thru BHGP's Rewatch (a good breakdown of each game the following Monday), Illinois sold their souls and then some to shut down our run game, putting 8 and 9 guys into a tight box most of the day. Nebraska may try the same thing, but I don't think they have near the defensive coaching Illinois does, and their LBs are especially bad. Look for Goodson to have a few big cutback lanes to hit due to overpursuing defenders.
As for Nebby's O, I think Martinez has regressed a decent amount. Teams have almost 2 seasons worth of film on him now. He doesn't have Stanley Morgan to lean on, he may not have Wandale Robinson Friday, and the felon RB is finally off the team. His completion percentage has taken a dive from 64.6% last season to 59.7% this season, as Frost is having trouble finding him safe throws. Furthermore, I think he's anxious. He's been pretty dinged up for the second year in a row now, and he's a big enough factor in their run game to take a lot of shots. I still don't think their OL is good enough to out muscle us up front, which means Frost will try and get cute again.
TL;DR Nebraska is going backwards.
Hawks 31
Fuskers 13