There doesn't seem to be a downside for Pruitt with this hire. If Freeze does extremely well, then Pruitt will get credit for that. If Pruitt is concerned about someone taking his job at this point, then he doesn't need to be a HC. This would be a big feather in the cap for Pruitt and it will give Pruitt a chance to gain perspective from a great coach. I really can't see a downside.
Honestly, if it's not Freeze, I'm going to be worried about Pruitt's decision making. This could really make him as a coach. Not pulling the trigger on a big hire like this is such a Butch Jones move.
Big coaches make big hires. The HC is CEO of his football team, offensive production doesn't equal what all a head coach does.