As a manager coming into a new job with a massive task on, where exactly do you even begin, I imagine most players are off on their holidays, so there's no one to really talk to regards contract terminations etc, and no one to train or implement systems etc.
What do you actually do? I guess you wait for takeover to happen, then finalise any deals you've set up? I've literally no clue what a manager does in pre-season mid takeover limbo.