re: Does It help that BYU will have played 1 season Game

Conventional wisdom is that your team improves the most from the first game to the second game. I think that's largely true unless the either opponent is particularly out of your league, one way or another. I don't think you learn much or improve from a highly lopsided (not result, but overall talent) contest.

Having said that, if BYU avoids the injury bug, they should gain at least a slight advantage in having played a live game before we do. Perhaps more than slight. However, I don't think that will affect the outcome.