I do agree with you that a playoff is needed, but who is to say that USC would get through? All the Rose Bowl proved is that the Big 10 is not good. Illinois looked like the JV out there against the Trojans. Even UCLA, who was plagued with injuries this season, looked better against USC than the Illini.
That is as far as I can go in agreement. Out of all the top teams, USC had the worst loss. That loss to Stanford was un-excusable. When they lost that game, their championship hopes were lost, and justifiably so. Even with the injuries, they should have crushed Stanford. Sure, they are playing as well as anyone right now, but you can't just write off the Stanford loss. While they would at least have a shot at the championship if there was a playoff, there is no guarantee. How many times have the no. 1 seeds been upset in the NCAA Basketball tourney? How many times has a team come from a lower seed to win the superbowl? Sure, they deserve a chance to play for the title, but championships are won on the field, and USC lost their shot against Stanford.