What is the standard though? 1993 to 2001 is probably one of the greatest runs of all time by any program especially considering it happened under different head coaches. Yes the end of 2001 was bad, but it was still in the National Title game. 1999 team very well may have been the best in the nation that year after getting revenge in the B12 title game, but didn't get a shot because there were two undefeated teams. Even in the midst of the greatest 5 year run from 1993 to 1997, there is a 16-0 rage bait game against ASU. That game is bafflingly bad wedged right between two of the best seasons we had in the run. 2001 was closer to what the national media thought we were in 1990 when we bombed out at the end of the year to Oklahoma and Georgia Tech. We consistently struggled to completely get through the Big 8 and Oklahoma usually had our number. When we would finally get past Oklahoma we would go to the Orange Bowl and get smacked by Miami or FSU. That is what most of the Osborne years were not the cherry on top of 1994-1997. Even 1993, with all the questionable calls, was another add it to the list of who Nebraska is. 2001 Nebraska was closer to most Osborne years, but we were coming off one of the greatest runs ever and the punchline at the end is highlighted by what was to come after it, 2002.
I don't think Frank would have done better if he was able to stick around beyond 2003, but it isn't like he should have been taken out after 2003. Fire him after 2002 and everybody gets it. Since he got 2003 and went 9-3, we should have found a way to let changes play out and see if the program would maintain or continue to go off the rails.