biggest or only real weakness in his passing game at this point has been against man coverage and Utah's defense excels at man coverage.

That now has me nervous.

Also stated the other big key matchup, which is the more obvious one, is if Utah can get any significant ground game going against BYU's defense.

Additional thing to be concerned about:

BYU's vulnerability on 3rd downs, both offense and on defense, and how good Utah's red zone defense has been.

On the other hand, BYU has been terrific with its red zone offense and Utah offense is even worse than BYU at 3rd down conversations. That gap is much, much wider on 4th down conversions.