and my opinion based on your circumstances is Blizzard Beach. While they both have lazy rivers and fun slides.....
Typhoon Lagoon's big draws that make it stand out are the wave pool and shark reef. The wave pool is very powerful and not a place for a non-swimmer or new swimmer....it can be frightening to get knocked down in there. The shark reef is an incredible experience, but I've seen plenty of non or marginal swimmers panic in there.
Blizzard Beach has a fun, cartoon like theme going. A great family raft ride you can do together. It also has the Ski Patrol area that is great for the 10 and under set. There are plenty of activites there your DD will love. Well supervised and in places you can stay pretty close. The wave pool is very gentle and bobbing and great for all level of swimmers.