A lot of our fans probably didn't understand that it wasn't the scheme Frost was playing that was the problem, it was just bad blocking so much of the time.
Disclaimer:
I could be completely and totally off my rocker with what I'm about to say.
Sometimes I wonder if Frost would have been more successful at a school other than Nebraska. I think the idea of "Husker Power' poisoned his offense.
These spread to run type offenses developed because these teams didn't have Rimington award winners on them. Offenses like Mike Leach's Air Raid have those big line splits because someone went out with a stopwatch and went "Our Left Tackle sucks, how long would it take an opposing DE to get to the QB if he wasn't blocked". That's a big reason those line splits are so wide is to extend the distance between the DE and the QB's launch point.
A lot of today's popular offenses were developed for this reason; to overcome offensive line talent disadvantages. The spread to run offense Frost used as a base is one of them. It's designed to run against light boxes and to use pulling linemen to create numbers advantages. Somewhere along the line it all got big and bulky and slow.