The King bed situation is a real mystery to me. The deluxes all seem to have them, and you can request one, but it's not guaranteed --- so don't count on it. You pay extra to get one at the moderates, but it seems to be guaranteed --- but might have a standard view. And we just requested (and got) a King bed in a standard view room at Pop Century at NO additional cost. It was a request, but not guaranteed.
So, it seems the only way it's guaranteed is if you pay about $15 more in the moderates.
We were told that the King rooms at Pop Century are all handicapped accessible --- don't know if that's true or not, but ours was. I've also read posts that many people got a king room at WL and it was HCA, but we had one that wasn't. Just preparing you that some of the King rooms are HCA (which some people want to know about).
Hope you have a great weekend!