Yes. Of course you are correct, but NFL teams never just fire a coordinator in the middle of the season and bring in some old, but “popular to some fans,” has-been at that point. It’s too late to do any scheme changes and it will make it more likely you double down on your problems.
Ultimately (and I think this is how most GMs would see it), DA is going to have to figure the rest of this season out on his own. After last year’s failures, he and Mickey decided Pete was still our guy, our offensive philosophy was solid, and that adding Carr, getting MT back, and having better health would make us the playoff team they promised we still were last year. Obviously, they seem to have been wrong.
As such, it is sink or swim time for the people whose vision we are currently experiencing.