I would have kept the BB offer, you can modify it if what you want becomes available. If you cancel, you can't modify. The room I wanted was not originally available for the BB offer, but the CM had me book a reservation anyways, because she said at least the discount was locked in. I did, and kept calling back and the room I wanted originally became available. I am also going to see what the
Disney+ offer is, I don't expect it to be better than 35% off a deluxe. If it is better, I'll book that if they have the room I want and then cancel the BB reservation. Hope you get your CL room!