People can scoff, but this is real. I can imagine having to approach the "administration" a second time in a little over a year to replace the second bad hire I've made, at great cost to the school, no less. It's a bad look from every angle. That's part of the reason you have to let this season play out. As Bud Grant always said, don't make a decision until you have to, and the U doesn't have to dump Johnson mid season.
That said, the question I'd ask people here who've been around a while is whether they think it was better that Monson was fired mid-season rather than waiting until the end. The sitautions are similar in a way, but they're very different, too. What I remember is that Molinari more than capably led the team after that. The team improved, and they weren't world beaters by any means, but they were worth watching, and I'm not sure they would've been as watchable with Monson on a slow death march.
If such a thing went down, I do consider Thorson capable of head coaching this team. Heck, he's the guy who had previous head coaching experience.