They won’t be deciding between 2 loss LSU(as described above) and BYU
That LSU team is going to be somewhere in spot 7-9. It’s more like an undefeated BYU vs an 11-1 Norwestern or 10-2 Wisconsin, maybe a 2 loss OKST, team. Those are the types of teams vying for the 11th or 12th spot.