Undefeated with our schedule is a slam dunk. But 1 loss would still get BYU in a NY6 bowl if the loss was close to a P5. It's all about where you end up ranked at the end of the season.
Sorry, but joining the AAC does not help with bowl games or revenue. BYU is in control of its own destiny ... it is all about winning and you don't have to be in a G5 conference to win.