mom - just so you know, going from Celebrity to Carnival is taking a step or two backwards, imo -- Celebrity is considered to be at the premium end of the mass-market cruise lines. They have done alot over the past couple of years to greatly improve the kids programs and to attract more families with school-aged children. You stated that you gave up a great cabin on the Millennium for something lesser on Carnival? WHY ?
Truly your worries are unfounded. Celebrity and the Millennium are top-notch.
If you had your heart set on Celebrity could you cancel your Miracle booking and re-book on the Millennium???