I think you truly can’t go wrong.
SSR definitely is more spread out and if you don’t have a car that might factor into your decision. However, more pools to choose from- 2 with slides and 2 having splash areas. Also rooms are being redone.
AKL has two great pools and very relaxing plus the animals
WL has a new splash area and feel very much you’re away from it all but still a boat ride away from MK
BW I think you hit the nail on the head and might have FOMO being that close to the Beach Club. The main pool layout is pretty tight IMO