I've been researching this extensively bc I have Little ones who need shallows. I am most impressed by the ones at SSR (they have 3 plus an awesome playground). I'm especially impressed with the newer one at the paddock bc the kiddie slides end in very shallow water.
Bwv has wading pool that's shallow but not zero entry.
BLT has one that's not too exciting but safe. Contemporary's is more "fun".
Like the pp said, pop is great and my dd3 loves loves loves the splash area at AoA (worth taking a pool-hop there even if you stay
DVC).
Kidanis is good but mine are very little and I'm afraid they'd be run over!!
I'm excited to try the one at GF bc the kiddie slides end in almost zero depth!! Yay for littles!!
I haven't found anything at OKW but I don't know that resort well either.
Hth.