This wasn't that hard of a solution to begin with.
6 team playoff. 5 Power 5 champions + 1 at-large. 1st round byes for the top 2 seeds.
As flawed as the BCS was, at least they attempted to create a system that took human bias out of the equation. The playoff is going the opposite direction.
You are assuming fairness is a criteria that the NCAA uses. The Big 12 has to figure out a method despite the NCAA's unfair system. And not hope for that NCAA will transform into using a fair selection system.