If you rebook on the phone, you might want to take a look at it online later, and/or specifically ask for promo rates. I rebooked Thursday afternoon (before the announcement was made and chaos ensued.) I added a night when rebooking and paid more $ for the new dates. I had originally had a preferred room at All Star Movies (because that was what was available when I booked.) They kept me with a preferred room at All Star Music in the rebooking (honestly didn't even occur to me to tell them I was fine with a regular room, I was just tired of being on hold and wanted it done), and didn't apply the "Fun and Sun" rate. I can't even imagine what CMs are dealing with right now, so I'm honestly not even upset about this. I wouldn't have even realized any of this if I wasn't looking to add a day of park tickets online later. I downgraded online to a regular room online with the Fun and Sun rate, and added the other day of park tickets I wanted, and I'm getting pretty much the same amount of $ back, that I paid for over the phone.
So basically I'm going to see a charge from Disney go through sometime this week, but then should see it come right back.