It is the VISION class that will be replaced by this new class. (and yes, I believe that RC will be building them). Grandeur, Enchantment, Rhapsody, and Vision are not being properly maintained by RC, and are definitely the next to leave the fleet. Radiance class ships are good for many more years. Making new ships with retractable stacks is an excellent idea - it's how Oasis has been able to sail out of Cape Liberty.