I think there is a recruiting incentive in playing serious OOC games for obvious reasons, already, and has been.
Take UGA, they had a poor slate this year OOC, fortunately that is unusual. And had they beat say ND, they likely would have made the playoff, instead of UMass (perhaps). If you play a Texas or even UCLA OOC, it's hypes your program, and if they are on the schedule down the road it helps with recruiting.
As for the myriad playoff schemes, I'll get serious about them when the NCAA starts talking about it. Usually, it is fans of teams that got left out most interested for obvious reasons.