If the BcS is a great system, why even have a chamionship game?

Yeah I agree I love the BCS because it keeps people talking about college football. I think a playoff system would kill college football. They are not like the NFL or March Madness. That is what so great about the sport. The Regular Season means so much in college football unlike any other sport. And if USC want to play in the National Championship they should go undefeated.