If the OC is truly gone, then the new OC has the say on who stays in this staff. A good HC can make recommendations, but it is up to the OC to pick the guys he wants for his scheme. Fields and Hickson could have a chance of staying because of their recruiting (if it is in fact good as some may think) and Stubblefield because of his technique, but at the end of the day the OC will decide.
Respect the take but no way Manny should let another OC have that much power again. He needs to learn his lesson. He gave Enos the ultimate power of choosing his staff and it failed. No OC has this much power btw. At least not at the top schools. He cant hang his career on another OC choosing his own staff. This is Manny's last shot. No room for error.
He should allow the new OC to evaluate the current guys and if they have a better option, Manny should listen but if he feels the guy in place is better, he should keep him. I like Stubblefield. (WRs got better overall. They had some bad games for stretches but I gotta pin that on Enos)... I like Hickson. (Except how he is doing Lo Lingard. Next time he is interviewed he needs to answer for that in my opinion).... Barry and Fields can go.