I've stayed at Jaguar Reef two or three times and stayed one night at Cocoplum Caye in July. Jaguar Reef is very attractive (as is Hamanasi, where I've also stayed). Cocoplum is a pleasant change -- not fancy but comfortable cabins with A/C. The food was good. I think we had lobster the night I was there, and there's an open bar included in the price.
I'm not sure what's happening with Perla Escondida. It's next door to Coconuts, and I hear they're trying to do a joint thing for a casino. Somebody who lives on the island can probably tell you. The condo units there seem pretty nice, and they're just a year or so old.