Auto bids to every conference, then 6 at-large bids (mostly going to the runner-ups in P5 conferences). One of Saban’s and Dabo’s biggest pitches is “come here, and you’ll be in the playoff with a chance to compete for the championship almost every year.”
Expanding the playoff diminishes that recruiting pitch a bit, and all you need is for a chink in that armor to start deteriorating. Over time you’ll see recruits begin to go elsewhere and there will be more parity. I just can’t believe how stupid college football is compared to every other sport. The game is completely broken.