We have to have an interim HC, or else who's going to be coaching the team? Plus we won't have a new coach until the season ends for every other team, because a high ranking coach isn't just going to leave in the middle of the season. So unless they currently aren't coaching somewhere (Butch), we would have to wait until the season ends to hire who we want. So if we fire Golden mid season, we dam sure aren't going to be promoting any defensive coach. the only real options to be the HC on an interim basis would be Coley or Kehoe.
You're still thinking October for Chumley's dismissal with regular season games remaining. I'm saying dismiss him at the end of the regular season where, if he's done bad enough, we likely won't be prepping for a bowl game. Even if we were, I'd be more comfortable having an interim guy keeping the seat warm for the new HC for JUST the bowl game, as opposed to giving an interim guy like Coley the last third of the season to "prove himself" to the AD as a viable candidate...because NO ONE on this staff currently should be considered for the HC spot after Chumley.
Again though--I think we need to have a super-short timeline to hire the new guy once Chumley's gone. If Blake James wants to keep his job, he'd better have a short list of 3-5 guys who are viable hires ready to go weeks in advance of letting Chumley go. Then, act quickly. Get the new guy into the job ASAP, and let him have December/January to keep 2016's class together.
Hiring the new guy in mid-January while remnants of Chumley's staff are running things from, say, October til then...that's a disaster waiting to happen as far as holding on to most of the 2016 kids. We can keep the kids' attention with a quicker hire (and of course, hopefully the right one). They won't have much time between Chumley's firing and the new guy's hiring to get butthurt about Chumley and his staff being gone. The longer you let that stew, the less likely a kid will want to consider us once the new guy is on board.