What questions do you want them to ask and what good do you expect to see from it? Just let it play out and fire their asses.
How about, "Hey Coach, have you lost this team?"
"Hey Coach, how did this program go from winning a national title two years ago to losing 15 straight SEC games and being run ruled in multiple games this year? Is it poor recruiting, poor coaching or a combination of both?"
"Hey Coach, do you expect to retain your job after this season? If things continue as they are currently going, do you think you deserve to keep it"?
"Hey Coach, has the talent on this team been overstated?"
Those are just a few off the top of my head. As to what I expect to get out of it,....clarity. His answers to these questions and more would tell everyone exactly where his head is and if there is ANY glimmer of hope that he would be equipped to turn it around. If he's unwilling to admit the obvious or deflects the blame to everyone but him, then everyone knows he cannot be here next year.