I think Nagy will be a bust. I think he is in over his head. Besides his lack of experience (which is not the end all be all), I think he lacks a clear plan and direction.
I think he has too much to learn on many levels.
This is the type of coach IMO will do well with the correct amount of seasoning as an OC or his 2nd HC position (if he gets a 2nd chance). I think Nagy has potential, but, is in a bad situation for him.