A 16-team field would be absurd. There is no reason why teams that couldn't finish in the top 10 need to get a 2nd or 3rd chance to contend for the title. It's not feasible at all, since it would mean the end of the bowl system and suck money out of the system. There's no logical reason, but the teams from Big 6 conferences not about to go without an automatic bid to any playoff that exists. Sure, it sucks, but an 8 team playoff wouldn't include any Boise State. A 10 or 12 team playoff would, likely, but then you're already stuck with a 4th week of playoff games, which is no different from a 16-team playoff, and then every conference could be represented. But why should every conference be represented? And why do we have to design a system that gets Boise State a shot? They made their weak OOC schedule. It's their own fault. If they scheduled a tougher one, and still went undefeated, they'd be ranked higher. But if they scheduled a tougher one, they probably wouldn't be undefeated.