They played an extremely depleted Utah State team that cant be seen as a real challenge to them.

They are breaking in Oline and Dline personnel

They next play Air Force a team Completely different from an offensive standpoint than BYU. So they aren't going to get a lot of reps against a fluid offense like BYU before the game

BYU will be playing their 8th game with pretty much a full complement of healthy players

I give Boise credit for having some good skill players but beyond that what am I missing to cause the concern