I think being reactive because a bunch of media personalities and angry fans are screaming for someone's head would be a bad sign. We all want change, but with Snyder's departure, we also were hoping that we'd finally have some responsible grown-ups in charge.
I think in this situation, responsible grown-ups see there is little to be gained by in-season firings. I sort of wish Harris would just come out and say, this coaching staff will remain intact for the duration of the season. Leaving it an open question, with every media outlet continually asking questions (now even directly to players) is not helpful.