I just wonder what he'd do at BYU. No head coaching experience, so it's a gamble how he'll handle that. Offense? What would that look like? And how would he recruit any better than Bronco? It's still BYU. No conference, weak bowl tie ins, and a strict Mormon school. It ain't Stanford.
I don't think it's a slam dunk. It's not intuitively obvious that he'd do substantially better than Bronco. So I say keep Bronco. For now.