"Who on the current staff should be retained?" Is better asked as, "Who on current staff fits with the track record of Richt?"
Taking a look at his tenure at UGA,the high probability is D'onforio is gone either before or day after Bowl Game. He wasn't staying anyways regardless of who was named HC. Coley is likely headed out the door unless Richt and he can figure out how to co-exist with a new HC [Richt] who has repeatedly stated for several days "I want to be more hands on." Isn't that the situation Coley left with Fischer at FSU? Richt would be foolish to let Scott, Beard, or Harris go in the short term from a variety of perspectives. All others, Brown, Kehoe, etc...could also be let go.
With all the above said, it is 100% irrelevant who the current players "like" or "dislike". They will play for whoever the new boss is, like it or not.
Wild card: What recruit(s) does Richt entice or flip into becoming the newest Canes?