this really is not acceptable----call back and ask for a supervisor--if they cannot help you, ask what the next level of escalation is and tell them you will wait while they check and keep escalating. I have stayed at the all star sports and it is fine--but you do expect to get what you booked. good luck and tell them you will keep going up the ladder including writing to the CEO of the company.
Complaining up the ladder, even all the way to the CEO, won't get you a room if there isn't one to get. Again, hotels all over the world overbook just like the airlines do. Most of the time, they don't have an issue, and it's really rare for Disney to have an issue. In fact, the only issue on this scale that I recall is when they were doing the switch from AKL to AKV in the lodge building and the construction was so intrusive that they moved a lot of guests to other resorts. Disney has even covered this in their terms and conditions on the confirmation:
"Disney reserves the right to cancel or modify a room reservation (including after the room reservation has been confirmed) if the room reservation
includes or resulted from a mistake or error of any kind, including but not limited to, a mistake or error in the rate,
Resort or room type, or where it appears that a Guest has engaged in fraudulent or misleading activity in making the room reservation." (bolded by me for emphasis)
At most hotels, you won't know until you walk up to the front desk that you're being "walked" to another hotel, and you won't be given a choice about it either. I would appreciate knowing in advance that I was going to have to stay at a different resort. I think Disney is trying to make the best of a bad situation, and I think offering a comparable room is adequate. Would I be upset if it happened to me - sure. But I've been to Disney enough to know that it doesn't happen often and I would do my best to make lemonade out of the lemons I was receiving. I've stayed at pretty much all of the Disney resorts, and had great trips in all of them - so it would be a disappointment but not a disaster.
I have read a thread or two where it has been mentioned that some CM's take great delight in punishing demanding guests by putting them in the worst room they can find. While I would ask if All Star is the best they could do, I wouldn't escalate it to the point where I might be labeled a bad guest and perhaps find myself in the most run down and inconvenient room they can find.