As the mother of 3 boys about the same ages (5,11,14) and 1 DD(8) I can tell you about our experience at the different resorts. If your kids like sports (basketball, tennis, ping pong, shuffleboard, volleyball) or sand & a playground area-OKW has all of these located at the main pool area, along with a great waterslide and pool. My kids loved that everything else was around the pool area at OKW last summer. My then 13 and 11 yr olds could play basketball while we sat by the pool. Community Hall is right by the pool area too.
SSR has a nice pool with community hall not far from the pool area and Artists Point (food) near the pool. DTD is a boat ride or short walk away, and we did this often when we were there. The Congress Park pool is awesome too and the grandstand looks cool.
My younger kids loved the BWV clown pool but the older ones liked OKW and SSR's more. We have not yet stayed at VWL, but will say that having the quiet pool at any
DVC is great for less crowded swims (most of the time).
And yes, we have stayed at BCV, which has an awesome pool, but we still like the other pools and resorts too. We will be in DIsney this August again for our own poolside vacation

Have fun choosing-you really can't go wrong-just think about what you plan to do most days and evenings, if that helps narrow it down.