They don't have a large office staff answer questions, especially to NON owners. So be patient and ask again or call them.
Yes, There are New boats coming to BVI, but not all old boats are being retired immediately. Right now SXM has new boats, not sure of the exact arrival date of the NEW Cruising Class yachts in BVI. I might have to look at the booking page and figure it out.
Owners are usually given priority for new boats over RCI exchanges, but it has happened that you could get one as an exchangers. I have even been on a LUXURY class boat that had an RCI exchanger on it too. It is NOT guaranteed that you will get a NEW CRUISING Class yacht, or a LUXURY class yacht, but you might.
Even those with AC do to run AC all day. Only from Supper hour to morning. Only in the heat of the summer is this generally an issue.
What is your issue? Old vs New AC vs No AC.
As owners we can see the yachts type currently slated for a particular sail. Mind you there might be maintenance issues and such that may require a swapping of equipment.