Asia is supposed to be a big hot destination for cruising but is it? Recently, Costa has cut back on its commitment to Asia and is concentrating more on Europe. It joins Carnival, Princess and RCCL i cutting back on cruising in Asia. Here's a link to more information. Perhaps the Asian market is oversupplied.
https://www.cruiseindustrynews.com/cruise-news/17464-costa-poised-to-pull-back-asia-capacity.html