Damn, very disappointing re: A380 DXB-DFW. I too used my free change already to do a date change, so now I'm sure they will want more miles if I change to another city.
On top of that, I'm flying on 3/26, which is the first day the A380 is back on the schedule, though like an earlier poster said, I'm very doubtful that will actually stay on the schedule. Hoping that a agent will understand my A380 motivation and allow the change is not possible, since its still scheduled for an A380!
Oh well...bigger problems have been had.