Yes, that's right. Radisson deployed the Diamond to the Caribbean for April 23 through July 26 sailings. She departs for the Transatlantic voyage on August 2. Of course, the way things are who know by then if there will be any more changes!
Radisson has also implemented some great features on the new Caribbean sailings, referring to them as "WOW" features. One of them is that the Diamond will truly be an all-inclusive ship....ALL drinks including Alcoholic beverages will be included throughout the ship! It's a great deal. You can read about it by clicking on the Luxury Cruise Center button or word link on the Cruise Bazaar page under Luxury Cruises.
Hope this helps. Please feel free to email me if I can be of any further help.