What would you do if you booked at say a Hilton. Requested pool view, 1st floor, away from elevators and were told no problem at time of booking and agreed to the rate for such a room? Then when you got there they said sorry, its not available. Only room is 4th floor, facing parking lot, next to elevators, take it or leave it?
Hilton allows you to select your specific room during online check in, but still says your room can be changed. A room request anywhere is just a request. Now, if in your scenario the pool view, first floor, away from elevators was a bookable category, then I would be upset and request a change or a refund. Even if the booking agent on the phone says it shouldn’t be a problem to meet your request, they have no control over maintenance issues or guests checking in before you who have requested the same thing.
In fact, Disney doesn’t even guarantee you the room or resort you book, if you read the fine print. If they overbook, you may be moved to a totally different resort (and if you search on the boards, it has happened). Heck, if Hilton overlooks, and they do, you can get walked to a totally different hotel brand. Every hotel does their best, but it’s not a perfect system anywhere.
I think in the OPs case, the late arrival probably caused the hiccup because everyone who checked in before them that day probably wanted a refurbished room as well. I would have expected the resolution to be a move the following day when a room became available, and if a refurbished room was important to me, I would have discussed that option while at the front desk.
I once requested the old north wing at CR because there were no smoking rooms in that wing. When I arrived I was placed in the south wing and told sorry, nothing we can do. Unbeknownst to me, they were preparing to close the north wing to start BLT construction. They never said they could put me in the north wing but I would have to move for my last night. They wouldn’t tell me what the issue was - I found out after the fact. I ended up spending ten days in a room that smelled like an ashtray. So I know how bad not getting your request can be.