maintain some kind of trump card over BYU.
The cognitive dissonance about BYU's Big 12 move is still strong, and it's been severely aggravated by the Pac-12's stability problems. Since the P5 pedestal that was supposed to give them a permanent high ground against us has proven to actually be quite temporary, there will be attempts to grasp at something else to replace it. BYU is probably a ways away from being able to win the Big 12, so the Rose Bowl is the handy lifeline for now.