I really do not think you are going to see kids playing 6 years on the Oline. Just is not going to happen again like it did.
Kids today are not interested in building a power, they want to play instantly and go to the NFL as soon as possible.
It really has always been hard to recruit to Nebraska. Coach Osborne had some National ranked classes, but they got higher as Nebraska gained notoriety it seemed.
WE are the only ones that care about rebuilding a dynasty. The kids of today are all about show me the money. How quickly can I play, how quickly can I get to the NFL, not what I can do for you, but what are you going to do for me. Way of the world. Just read the posts on these threads. My guess most on this site are around 30 to 35, millennials, and almost every one answer the quest by give more money, no matter what it costs. The younger generation is or may even be more geared to self fulfillment.
Unfortunately the kids Nebraska really need are the kids that are not team members. They participate in individual sports, such as boxing, amature wrestling, motocross, UFC type of stuff. Those are the fighters, but normally do not have the size to play the game.
During the Osborne days you saw kids redshirt and play all 6 years. Leaving early was not normal, you were quitting on your team. They don't feel that way anymore it seems to me