Lots of good thoughts in the tread.
The more I think about it the more I think identity has more to do with execution than anything else.
Today, Lee is a 54% passer averaging 7 yards per attempt (81st in the country) and almost 16 incomplete passes per game. That's ugly, approximately 20% of Nebraska's plays are incomplete or intercepted passes. If Lee were at 65%, we're watching an offense with about 4 more complete passes a game and an extra 50 yards passing. If he was more efficient or if his receivers were able to haul in the drops, we're probably having a different conversation.
UCF, on the other hand, is at 69.9% averaging 11 yards per attempt and 8 incomplete passes per game. Amazing efficiency.
The thing about running a spread offense is that it allows you to get a numbers advantage based upon the defensive scheme, either running or passing. If you're 4 wide, the defense has to decide to press man to man and put 7 in the box, or have safety help and only 6 in the box. If your qb can run, the zone read is really hard to stop in this situation. 5 OL vs. 4 DL, 2 LB vs a running QB and RB.
The teams that were able to stop Oregon (in the Kelley/Frost era) tended to have great DL play: USC, Stanford, Auburn (2010 title game), and OSU (2009 Rose Bowl, 2014 title game). But, what teams don't struggle against great DLs?
So, to me, the reason it feels like Nebraska has no identity is because the passing game is so inefficient. If 20% of the offense is incomplete or intercepted passes, it's hard to feel like they have a consistent plan and are getting things accomplished.