I don't necessarily think it's a fait accompli that JDR is gone.
Ironically, I think I would be more worried if he already wasn't a head coach. This is only his first year coming off 8 years of overall mediocrity in JAX at best. What rebuilding team would want that? His prowess with defensive personnel is nothing new. If he was a younger, up and coming guy looking for a chance, I'd be more worried.
I'm sure someday he will get another chance, but I just don't believe that time is now.