I wish I could locate it again, but I don't remember where I saw it. There was something I read a while back showing several seasons under MR where he produced thousand plus yard rushers. I think 3 or 4 of his OSU backs rank top 15 all time in the Pac 12 conference for rushing yards. Several of his QB's were conference passing leaders, I think one is THE all time record holder, and his offense also produced several WR's who made NFL rosters. Two won Bilitnikof awards for nations best college receiver. He did that with recruiting classes ranked in the 40's. He can do a lot better here and has so far in recruiting.
We know Nebraska can attract and recruit great O-linemen and running backs. MR has now shown we can also attract top WR's and Pro-style QB's as well. The downside to his system is getting the QB past the thinking stage and to the subconscious read and react stage. I think the first three games this year leaned heavily on the pass for the primary reason of getting Lee live game rep experience to help accelerate his command of the offense and get him closer to the read and react stage. MR's history shows he likes to and will run the ball and when teams respect his QB's effectiveness there's not much they can do to stop the run without giving up big plays in the passing game. A little better play from the line, the WR's and Lee and we are right there with the backs we have.
I understand your concern, however I really don't think we are all that far away from seeing a prolific offense take shape. One that can produce rushing leaders, passing leaders, and reception leaders. Several pieces are in place, game experience and learning are the final steps needed before it can blast off. There's no teacher like experience and that does take some time.