I went today, at least when we left around 2pm, the tot-tiki and runamucka reef areas weren't open (they promised sometime today though) along with the slower lazy river. The wave pool was blocked by today show and promo filming until about 11AM. The only kid friendly area was the leisure pool next to the OhNo OhYeah slides. Took my 2 year old daughter into the leisure pool which she had a blast with, I did the fast river (which wasn't really that fast, I think not all the wave generators were working) and the OhNo slide, which drops you at the end. She wanted to do the tot-tiki area quite badly, but it wasn't quite done. I think they are more strict about the height limit to keep the younger ones from getting steamrolled, parents can join as far as I could tell.
The park is beautiful, but not 100% complete. We still had fun, but went to guest services and they gave us $100 in gift cards to use on a future visit since 3 of the main things for my daughter weren't even working. (and some of the other rides were on/off during the day) We only had a half day to go today (AP holder) but will try again in a few weeks. Once the kinks get worked out this place will be awesome. We did get in the wave pool it cycles through different types of waves based on the rotating symbol just to the left of the Volcano.