I mean if you wait til Christmas you might as well just wait til the end of the season, unless he wants to take over himself being afraid Brunette is harming the younger guys. If we aren't close to a playoff spot by then its over, even though history says its pretty much over already.
I really don't understand what the waiting for is though. The only hope you have for this roster is a coaching change, it's the only string you have available to pull before you just call it and blow it all up. If the goal going in was to be competitive this season then he should have been yanking it weeks ago, let alone now.