The GF is not a luxury hotel. It is merely WDW's "nicest" hotel, the one Disney markets as "luxury". No one should expect the type of service that one finds at a true 5 star resort, not even the level found at a Four Seasons or Ritz Carlton. As for cost, while the GF and other WDW deluxes are "expensive" relative to other resorts at WDW, the WDW deluxes cost significantly less than many 4 or 5 star resorts. At the GF, you are paying for location- convenience to MK.
I do think that WDW should have a true luxury hotel on the property. It would be full to capacity.
I do think that WDW should have a true luxury hotel on the property. It would be full to capacity.