Anyone saying the Defense wasn't good last year is insane. The defense was very good, and that is without true difference makers, although I thought Damion was very disruptive. This year is really simple. You have no one on the interior of the line that can play at a very high level. Ty Robinson (and I have said this before) is fat, and has eaten himself out of being explosive at the point of attack. Nash just sucks ( been saying that since he signed). Drew is really small. Wynn has been a bust his entire career, Weaver and Buckley are wastes of scholarships, and Feist is just a glorified back up talent. The D-line has been poorly managed since Frost took over, and I am not a fan of Dawson. I think he is the proven weak link of this staff. He cannot recruit, and Nebraska should always prioritize their line coaches.
S&C has failed the lines too. Frost has been shell shocked by our lines being pushed around in 18 that the philosophy has been to put too much mass on those guys so nobody pushes us around.
The bad line play exposed the truth about Heinrich which is he can be a liability in an open hole. He just isn't as athletic as you'd want, but good line play would cover up that deficiency. I am not too worried about the secondary, because I think time fixes that spot. Young, talented guys who are eager only get better.
I do not know how the d-line issue gets fixed. If Nebraska is to survive somehow this season, the offense is going to have to commit to being like the rest of the BIG, and that is eating up chunks of clock every possession. Limit the other teams snaps like they do to you, and let your defense rest for 20-30 actual minutes. Frost is an idiot and goes against this philosophy and yet it is the one that continues to kick his a$$.