Caribbean cruise... worth it?

Hey everyone! I live in Hawaii and our family is flying to Florida for a couple of weeks this summer. Is it worth it to fit a Caribbean Cruise in the middle so we don't get super bored in Florida (We've been to Florida at least 30 times, we used to live on the East Coast) How would you compare Grand Cayman and Cozumel to Hawaii (Maui especially)? and also.. if you know.. how are Isla Roatan and Belize City compared to Hawaii? thank you!!