My opinion on NFL marketibility position-by-position.
QB: We are yet to see what PJ's version of the offense at Tech looks like. He has said Tim Tebow would be the ideal guy to run his offense. Tebow clearly has an NFL future. If we can recruit or develop this type of talent, we might see a QB make it to the pros. Depends on who we can recruit. Maybe slightly less likely.
B-back: The NFL likes big, hard-running backs with moves who can catch the ball. Sounds just like PJ's prototypical B-back. Not many chances for the b-back to showcase pass protection skills. I think this is a wash vs a pro-style offense.
A-back: A-backs with decent size could make good recievers or third-down backs in the NFL. If they are a kick returner, so much the better. Ability to block in space is hard to learn and could be valuable on ST's. Probably a wash from say, Reshaun Grant in Gailey's offense.
WR: Probably just depends on the talent. If we have a fast, shifty WR with size who excels on reverses and is a big play reciever, then why not? The NFL LOVES WRs who are excellent blockers as well, and PJ's usually are. Probably less likely, but depends on the athlete.
OL: PJ has a few OL in the pros. The pros have marvelled at these guys abilities to block in space, and how disciplined, and well-trained they are. On the other hand, they don't get to showcase a lot of pure drop back pass protection skills. A lot of PJ's throwing is play-action.
That said, pass protection is very learnable provided you have the right kind of athlete. The pros take a very developmental approach with OL. As long as our guys have appropriate size, I'd say it's a wash because all of our OL should be fast & have good footwork. Nebraska put a lot of OL in the league in a mostly run offense.
Just my opinion, but it will be interesting to see how it works out.