While every year of JFG's tenure has made me less and less of a believer of his coaching skills, I believe he will get another year if only because of the poor image that could result in relieving him after the year of injuries. (I.e. Prospective coaches may not see this as giving him a fair chance so less likely to get the best candidates) However, if I was the new AD I would insist that he bring on an assistant coach who was an excellent in game coach and defensive guru. Not sure who should be replaced but the need for someone to improve the in game situation adjustments along with a substantial increase in defensive skills would probably supersede anything that the assistants are currently bringing to the table...
While the staff leaves much to be desired, the first priority would be to bring in someone who can bring new life to the program and help recruit better talent. I'd take Dee Brown anytime over a veteran assistant etc. Chances that there will be multiple changes at the assistant level are almost non-existent, so priorities need to be set. Having said that, I am not sure any changes will be made though.