You can’t hire a new coach in a day. We lose the biggest transfer market in history if we were to fire now. You fire him and start a coaching search and that coach is way behind the 8 ball again
But they can be actively making up their list of coaching candidates right now. If Brannen is fired I imagine the coaching search won't take long.
Also, we are pretty much in rebuild mode right now anyway. Firing Brannen would be about improving us 2/3 years down the line. Next year is looking like a wash no matter what.