The Valiant option for Western Caribbean is Roatan and Costa Maya. We haven't been to either, but they don't seem that desirable. The Eastern Caribbean includes San Juan, St. Croix and Puerto Plata. We've been to San Juan twice on port stops (as recently as a couple months ago), and St. Croix in January 2020 - which was a bust IMO.
We were really looking forward to the southern itinerary out of San Juan, but at this point I doubt Virgin will ever depart out of there (it appears it was 1-season only), so we'll have to start looking at other lines again.