tried to get people in space to make plays. BYU has never had guys that could consistently do this. Thus its not our recruiting base. I understand your meaning of up tempo....but GFGH was an offense that was counterintuitive to BYU's recruiting base.
I think it also is one of the reasons BYU has lost the last 7 games to Utah. yes many were close, but Utah has been better in the trenches and I think its a core reason BYU has lost so many. Control the LOS...Win the game.