I'm not saying I support Mario, because I have no desire to see him here and it would be a huge miss by the admin considering the other options we have.
With that said. Coker is a mirror image of Joe Philbin. He will have no control of the team, the team will grow entitled when they haven't done anything, and the high expectations here will be too much for Coker to manage. UTSA is a great place for Coker, because he can pretty much do whatever he wants there and noone cares and those kids are just happy to be on a football field.
I'd take my chances with Mario before bringing Coker back as a HC.