First, we're not talking about a 20-game schedule like the NFL+preseason.
Second, no chance a good team would sit their starters unless they were actually recovering from injury. Very few college kids are going to have enough experience to warrant that.
Third, schools already face significant pressure to schedule good OOC games. Good games bring in more dollars to the local community because they are better attended and they bring more dollars to the conference because of better TV ratings.
Fourth, as long as there are at large spots available, scheduling will still matter.