My opinion is that although those islands seem tiny on a map, they have plenty to offer for several days. I appreciate that some people travel faster than others, but why spend precious time commuting among islands rather than enjoying the islands their selves? I would make a point to spend at the very least 4 nights on each island, no need to add more destinations.
Now if those should be the islands you mention or others... It's a personal call. Personally I would tend to replace at least…

