It slows expansion, but only because the remaining biggest domino got a life line.
1) Notre Dame basically got a free pass into every playoff as long as they're not absolute garbage. Expansion won't move until they have to make a decision. Maybe a few years without being able to get a bye week will change their minds. Maybe NBC gives them a 2nd lifeline with a half decent TV deal
2) New playoff and ACC GOR leaves low probability that anyone in our league is going anywhere anytime soon. Top brands will still be clawing to get out though. The money disparity is just too much.
Add those things together along with the SEC and BIG almost guaranteed to fill out most of the at-large bids and your incentive to grow isn't as strong until you can get Notre Dame or those top few brands from the ACC.
Going to be quiet for a bit