While I understand the treatment of Jonty regards his departure were far from ideal, I do wonder if Pryce is looking for some experience at senior coach level. Pressure is no mounting on him and needs a old head to advise.
Jonty as been an assistant for a succession of unsuccessful coaches over 8 years , never been offered the head coaches role, maybe Pryce looking for a bit more from his number 2.
Having said all that I believe his departure was more down to trust issues regards player conversations, rather his coaching abilities.