If top teams were forced to play tougher schedules, they wouldn't always finish with 1 loss. Part of the reason the top teams look so loaded is they are rarely tested. The parity is there, it's just not tested as much. Tell that to LSU who has beat Texas, Florida, Auburn, Alabama, and Georgia this year. The rarity. Congrats to them. Hand them the trophy as they don't need to play anyone else then.