I think you're going to see a big bump in former P5 coaches in CUSA and the G5.
It seems that the new trend is literally, tossing tens of millions of dollars for coaches to get to the CFP. Out of, what, 58 coaches, only 4 get in? That means about10-15 of them are going to be canned for an 8-5 season (see Kevin Sumlin) given enough money to retire by (see Jimbo Fisher) and expected to get to the CFP despite going 6-6.
You're then going to have schools basically hire PI's to find dirt on you so in case you go 8-5 or 9-4, they can find ways to fire you and not pay you.
I imagine many coaches are gonna catch on and say, "screw that!" They will then go to a place like FAU, who has ZERO expectations, pay you decent money, and you can lose 3-4 games a season and still be considered successful.
Some, will move on, but go to places where the pressure to win isn't so damn insurmountable that they can be paid and still coach.
If they choose not to, they get locked in for 10 years, make good money, and can afford a losing season here and there.