Not an SAB fan at all, find it difficult to watch kids in.
DVC Only
Zero Entry pools: SAB, SSR
Kiddie Slides: SAB, SSR
Good Pool Bars: ?, BWV seems to be a favorite, SAB (Hannah's) looks very comfy, but I haven't been there.
Easy to watch kids at: Anything EXCEPT SAB
Bigger slides: BWV, SAB
Close to Villa: Depends on what villa you get - at a place like OKW you may be in for quite a walk - although the end of the hallway at BWV isn't close either. All the Villas at VWL are tucked back from the theme pool - Villa placement there is not convienient.
Crowds: VWL seems to be more crowded - it seems to get more crashers from the campgrounds, etc and is a small pool for the resort size. SAB is big, but since a lot of people stay here specifically for the pool, the pool can get crowded. I've heard said that the SSR pool already seems underbuilt for the resort, but haven't been. I haven't been to the OKW pool either, but I'm guessing it has the edge for crowds - seems to be sized right, isn't attractive to crashers (or DVC hoppers) being somewhat out of the way.