I am most turned off by the spongy slimy mud on the ocean floor

mentioned by Neuro0 #28 & several TripAdvisor reviewers! I go to the Caribbean for an active vacation of swimming & volleyball--not into lying on the beach. This tells me I better use my FFN at Hotel Victor instead.
I am sched. to get off my cruise ship Feb. 28 & only 1 of the next 4 nights is available for FFNs/ 15K points.
The Marriott OTOH has

Point Saver availability without upgrade $$ for March 1--8. Or I can do the Westin for $455 a night all-inclusive--incl. tax & SC!