If this is your first liveaboard, also consider that you will likely be diving more frequently than you did in the Caribbean. By the third day or so, hour-long dives that felt fine on the first day may start feeling chillier. I have read of people skipping the night dives later in the week because they just didn't want to get back into the water after having finally warmed up. At least bring a wetsuit, just in case.
I was in the Maldives in April on a live aboard, kind of comparing the temps to that.