We booked our January stay at the Dolphin thru Hotwire. When we checked in I requested a renovated room and showed my SPG Gold Card (which I know isn't supposed to do anything when booking thru a third party, but worth a shot!) Anyway, the CM was looking through her computer to see what was available. She regretfully informed us there were no more renovated rooms available (large convention), but were we comfortable with heights? As it turns out we were on the 16th floor with a GREAT view of MGM, the Boardwalk and Epcot. We were able to see the fireworks from Epcot and Fantasmic every night. What a great room! As it turns out, she moved us from a "D" room up to a "B" room. I'm not sure she was even fully aware we booked through Hotwire.
Enjoy your stay!