If the rooms are such a terrible mess that they take so long to clean, perhaps DVC should increase the amount of mouse keeping DURING the stay rather than forcing members out at the break of dawn.
Have there been any instances reported where the guests have been told to leave? I understand that it is annoying if they knock prior to checkout and ask you when you will be departing. And if it happens when there is a DND sign on the door, it is unacceptable. But this might be a situation where people need to be careful what they ask for. The likely solution from DVC may be to change the check out time rather than to hire more staff.
