Freeze with a guaranteed $40M contract with zero stress, zero pressure at Liberty would have to be mental to move to Auburn.
Kiffin is a pipe dream for Auburn. He can get his ass kicked regularly by Saban and Smart at Ole Miss without the dysfunction that is Auburn. I think Kiffin thinks Saban will pick him as his successor...... but I'd not be surprised if <gulp> Saban suggests Heupel as his heir apparent at Alabama.
Could Jimbo get bought out at aTm and end up at Auburn?
Could Sark or Venables jump to Auburn?
Realistically, Auburn doesn't even have a decent AD candidate, much less a path to a quality coach. Anyone up and coming with aspirations of a career in the SEC would be crazy to look at Auburn right now. There's not a "splash" hire desperate nor stupid enough to take Auburn right now.
If I were Auburn I'd hire Kevin Steele. He is likely acceptable to the boosters, would probably take the job, knows the SEC, and can't be worse than Harsin culturally or technically as a coach.