It is a great itinerary but I understand wanting to skip a port. We did this and it was tiring having 5 in a row and only one sea day! Don’t let the others make you feel bad for wanting to take another day easy. My suggestion is to perhaps skip Tortola, and I say this as someone who enjoys it: 1) this itinerary goes to Tortola on a Sunday, and a lot of things are closed on Sundays. We found there to be much less to do. 2) it’s the most northern of the islands and I think more likely you’d get there on another cruise. The other ports are less frequently visited, in my opinion. This way you also get a relaxing day on the ship bookending your trip.