I agree. But I don't see anything credible saying that Loomis wants control over who is on the coaching staff and he has already let two coaches take new jobs including one lateral move by Hodges. Plus Loomis specifically said that the new HC will get to pick his staff and that he would not be forced to keep any coaches.
If there is an issue, I suspect it's that McCarthy wants full control over personnel decisions and Loomis doesn't want to give it to him and wants to do it the same way he did with Payton and DA where Loomis gives them what they want in most instances, but Loomis maintains final say. Maybe that's a mistake by Loomis and he should give McCarthy full control. But, I don't know enough about McCarthy's talent evaluation ability or his success rate in the past to know if it's the right call or not.
Regardless, I'm more excited by the prospect of Moore at this point and would prefer for them to swing for the fences with Moore.