I've been there twice this week. The sting ray touch pool is open, and you can feed them. Dolphin cove is open, but I don't know about feeding them. The sea lion area is open, and I believe you can still feed them.
I found the Sea World website to be accurate about closures. It's really just the two fully indoor rides - Antarctica and the motion simulator one - that are closed. Many of the drink stations and kiosks are also closed, and some rides have shortened hours.
Aside from when Atlantis goes down and the line builds up, we basically didn't wait for anything at all. You can walk into Manta, Kraken, or Maco and get on immediately. We were in the sea turtle underwater viewing area by ourselves on Wednesday.