I wonder if the plunge pool will actually keep families with small kids away...We stayed at a house in St. John when my dd was 2.5. They actually didn't want to rent to us because we had a toddler, but it was a large group and they said ok.
I don't think Disney won't want to rent to families, I am just saying it does pose a whole new risk that people who maybe don't have a pool at their house may not think of until they have checked in and realize all their toddler wants to do is run towards the pool
I must say, that is non-stop work making sure your toddler doesn't fall in the pool!! When you take the kids to the pool, that is different, you are there, you are on guard non-stop, etc. But to not be able to relax in the room because of the pool outside...I think I would wait until the kids were older to try it out (If my "babies" weren't older now). Just a thought....