Honestly, not that interested in a cruise GP or EP. I'm not sure how eating, swimming, lounging, ect. would be any more fun in a contained environment.
I'm much more interested in an Italian or Asian getaway as they could offer us new experiences and activities. The most interesting part of a cruise is it's excursions, so I'd rather have the focus and gameplay be on the excursions and not on how they get there. Just my opinion of course.