When are you scheduled to go?
Later this year.
Frankly, though, after all the research, I think I'd rather just return to MLE, for my money/points.
Conrad MLE is probably the single best redemption in the Hilton portfolio, and being HH DIA, I'd have a decent shot at an upgrade to OWB with plunge pool. And, even if I didn't, their beach villas look phenomenal to the point where I almost wouldn't even care if I got the upgrade.
Whereas, the points options in BOB look... underwhelming, even if you are able to win the lotto and find an OWB at IC Thalasso, the room looks... old.
Sure, there is the Hilton BOB, and the LM BOB (both of which only have plunge pools at the tippty top end, read: presidential villas), the topography is better, but combined with the routing options, I think MLE takes the nod.
Most of the above can be discarded if one is prepared to drop $1500/night at St. Regis or Four Seasons.