John Fox is old and has been doing this for nine years already. How long before he just burns out? The intense strain and the endless hours just wears people down. Eventually they lose focus and can't really do it anymore.
I say PASS!
As for Dennison, I've seen NO indication that he's ever going to make a great HC. Looks more like another one of those guys who, in accordance with the "Peter Principle" rise to the level of his incompetence!
Coordinators who succeed sometimes get the chance to be HC, but that doesn't mean they're all up to the task. I'd rather see Morningweg given an interview. I have no idea why Elway seems determined to pick from a bunch of 2nd raters!
I'd be surprised if Dennison succeeds. I'd give him maybe 2 or 3 years, tops!