Because conservative coaches hire conservative coordinators. Every head coach the school has hired since Erickson left was hired for one reason. To keep the program out of trouble. The Pell Grant scandal and the out of control football program scared the administration. Butch, Coker, Randy, Golden, even Richt were hired because they had goody-goody reputations and they wouldn’t allow the inmates to run the asylum again. None of those guys were innovators or ground breaking coaches. They all pretty much ran systems they were familiar with or systems they played in. The old “it worked back in the day, it will work now” attitude a lot of people still have today. Howard, Jimmy and Dennis had success because they all did things their way. They were innovators. Schnellenberger’s pro style passing game was mind blowing 40 years ago when everyone was still running the wishbone. Jimmy Johnson installed a 4-3 over defense that emphasized speed over size and strength was visionary. Dennis Erickson’s one back, triple shoot offense was one of the precursors to the modern spread offense. Miami might have been the only national power using a 3 WR base offense. But creative types, innovators, can tend to be gamblers and risk takers. After the NCAA dropped sanctions in the 90’s, the school didn’t want risk takers. Now Butch Davis was able to amass such a great amount of talent, the early 2000’s teams didn’t need innovation. They just out talented everybody. But the talent levels eventually dropped off an the offense went into the toilet.