ZERO info but just being logical this is my guess. And yes I'm excited to hear about how this is negative
Thorson-lead asst, supposed defense guru, local guy with history. Never getting the ax.
Jenkins/Kemp- I can see Coyle going to CBJ and asking if a shake up would be good. Now in my opinion, CBJ seems like an awesome human. Nice guy, thoughtful, cares about people. He says, nope this is not their battle to lose, I brought them here they stay.
From Kemp/Jenkins end, I'd assume since they don't have long resumes that their only options were to stay at a B1G school or drop down a level. At this point that makes no sense, stay here, get a higher salary, if CBJ gets canned next year then you go from there and can accept a lower job.
That to me seems like a logical timeliness of what MIGHT have happened, none of us obviously know.
That said, I agree with the OP, I think we needed a shake up. I think CBJ needs to find an edge. Being the nice guy in a cut throat industry doesn't work. Sometimes you need to cuss out a ref, sometimes you need to bench your star player who isn't playing defense, or maybe you need a new asst coach. Again he seems like a great human, and this sounds harsh but frankly I don't care if the coach is a nice guy, hes not marrying my daughter he's trying to win games in an ultra competitive job.