We did get a plat upgrade from a beach room to an ocean oasis (over water). I was told it was NOT common to give plats upgrades at this property, and to be honest had I not received I would have coughed up the extra $$$ on the spot for it- if you are going to spend that kind of change, it would be a waste not to have one of those over waters, they are absolutely astounding.
Again if anyone is considering, i cannot recommend this property more highly. Absoluter top in accommodations, activities, food, and A+++ service. Quite a pain to get there from the states, but no question it was well worth it. Hoping to get back at some point.