It's been a while since I gave my opinion in a survey, but I decided to give more feedback going forward. Here are my quick thoughts:
1. Avariel - rated it OK. Noted that in previous lore, they are noted for their beautiful singing voices, so I suggested proficiency in Performance. Also said that their "hollow bones" could create some sort of drawback that might balance flight in the eyes of many, though I did note that drawbacks aren't too popular.
2. Grugach - I really loved the grugrach and said so. However, I noted that according to the accompanying text, they should probably get some sort of bonus to Survival checks and have trap-making skills.
3. Sea Elf - Again, really loved this one, though I said they need to be able to talk with dolphins.
4. Shadar-kai - Expressed my dissatisfaction, not so much with the mechanics, but with making them elves. I said that they should go back to being 3e shadow fey, 4e descendants of humans, or make them their own thing.