I did not intend to give the impression that the rooms are "nasty" , the resort manager was concerned and we did get a clean room.
I would recommend showing up around 3 and look at your room first. In some areas of Florida, good housekeeping staff is hard to find. Many times the resorts end up using a housekeeping service instead of direct hired staff. This is true of areas like Orlando and the Keys. In, Orlando the unemployment rate is so low, that it is a very tight job market. So, it is hard to find housekeeping staff. But, the room layout is good and I got the impression that the resort staff would fix any problem that arose.
We always check the room, even if it is a Hyatt, Hilton or Marriott - even the best timeshares can have rooms that are not inspected. Grand Beach is a fairly large resort, so I would not worry about it. Your room will be fine and you will have a nice vacation.