Here on TUG we who are interested in Disney vacations are pretty much well aware of the difference between Disney hotels and Disney timeshares. No one compares Disney's All-Star hotels with other high-end timeshares. There's no doubt, Disney timeshares hold a resale value better than any other system, and it's very expensive to pay cash rates for stays in Disney timeshares. That's exactly as to be expected because no other timeshares are as enmeshed with an overall vacation experience than that offered by Disney - where the Disney-branded theme parks are a unique draw, the "pixie dust" is everywhere even extending to Hilton Head and Hawaii, and most members/guests in the timeshares/hotels are perfectly happy to never step one foot off of Disney property. Disney could put a theme park in the middle of a swamp and make a mint of money surrounding it with hotels and timeshares - oh but wait, that's exactly what they did! Minus that captive audience factor there's no way that Disney timeshares wouldn't be as susceptible to the ravages of the external resale market as every other timeshare.
If members/guests were not captive to the overall theme park experience, and we were comparing each company's building/unit layouts and different management styles, I agree with
@dioxide45 that Disney pales in comparison to some. My comparison is to the Marriott timeshares I own which have larger units, more comfortable beds, busier onsite activities schedules AND more activities outreach in the surrounding community, more-frequent soft- and hard-goods refurbishments (5 and 10 years,) and, higher housekeeping standards (which I know can be hit-or-miss and maybe I've just been unlucky during my numerous Disney stays.)
As for cash rates, again, the captive audience factor supports Disney's sky-high cash rates. If it weren't "SOLD OUT" on the website I'd be able to give you comparison figures for a cash stay in my SurfWatch 3BR July week. As far as availability, I've never had a problem finding cash-rate availability at Disney timeshares. (Again, maybe that's just luck, or the fact that I don't do stays at Disney when it's most crowded.)
It's okay for all of us to have different opinions about all the different timeshares - TUG exists because we all like different things! I'm writing this as a self-admitted Disney freak who loves DisneyWorld but my husband does not, which is why we bought Marriott without ever feeling that it was inferior to DVC. Fortunately it's possible for me to indulge my Disney love with cash stays and DVC owner rentals, and we're enjoying the best of both worlds.
I am sorry that you found horrible housekeeping issues during your Marriott stays. We Marriott owners find that the onsite GM's are generally responsive to legitimate guest complaints so next time, you should stop at the front desk and ask to speak to the GM.