He probably knows he has to move on if he wants to be a manager anyway, I think he’s said so. Also by his own admission last time out, he wasn’t the man to do the job.Having been overlooked for the temp position despite winning trophies he must surely realize it's time to move on if he wants a proper career as a football manager.
Duncan has more recent experience with the first team and is a UEFA pro license coach so that makes more sense.
I certainly don’t think Unsworth is finished.