I don't think it's about sacking them, I would definitely keep Dodds around, but the new head coach needs to decide their role. If Still for example came in and wanted Dodds back in his developmental role and Speakman said no he needs to be the assistant a major problem. Plymouth had a similar issue with the coach they just sacked Forster, he brought zero coaches with him for his first major head coach job. Recipe for disaster.
Many good coach should be able to understand the manager's instructions and coach the players accordingly. Hopefully the manager would be heavily involved in the training.
And I'm quite keen for the manager to have an assistant, it's a big job and a good right hand man can be invaluable.
Whatever happens it ll needs to be crystal clear before the new manager arrives ...
... it's pointless having another Mowbray who takes the job then wants things changing to fit his philosophy.
