All YC we've had, including two RS, split. As a matter of fact, some stunk as the ridge between the two didn't match up and was uncomfortable.
Obviously the YC outside area does not have a roof nor does Viva Haven. We sailed Prima Haven and not really impressed although a 2 br would fit your needs best since MSC hasn't gotten clued in to have even a 1/2 bath in their best rooms. Conversely, reports, and experience, Haven kings don't split.