Why would Frost leave UCF at all? He's got a good thing going there. More seasoned coaches with more sterling credentials and reputations than he currently has have gone to places like TEN, FLA, and NU only to leave with their reputation in tatters.
It's not easy to win at these places. If things go south, Frost is going to want to be able to point to more than just a good year at UCF. Plus, his Golden Knights are probably as good or better than both a new-era Nebraska and Florida would be next year.