GNF,
Nice job trying to give a concise summary of Nebraska's "confused era". I could go through and pick apart portions of it that I disagree with, or are contentious, like IOV did, but I think your general point is more important. And you are right.
The real question is: how do we avoid this going forward? Do we allow Riley to "fix" his offense by bringing in a better OL coach and OC that still runs a pro-style system? I doubt there would be much support for that, but it would be a logical way to end the cycle of yo-yo-ing.
I think one of the biggest reasons for the yo-yo-ing by the ADs is that they are bowing to booster and fan pressure, which happen to be very powerful at Nebraska. Has that served us well? Ask Texas.