(Yes, I read way too much science fiction, but I think it explores some interesting scenarios we should seriously consider while debating the issue. For a very popular reference: In the Star Trek universe the Eugenic Wars explore problems of genetic enhancements; The character Doctor Bashir in DS9, for example, is an (illegally) enhanced human [http://en.memory-alpha.org/wiki/Julian_Bashir])
I've had to wear glasses since I was 4 and would have been very happy if this would have been fixed before being born.
But I agree not everything is so clear cut.
At any rate, I'd prefer to decide myself what is a feature, rather than having some 'ethicist' decide for me.
None of those are features (and they are "perfect targets" for gene therapy because we have a thorough understanding of the consequences of the edit).
Sickle cell anemia gets trotted around because carriers are somewhat resistant to malaria, but it turns out that everyone who had the choice eradicated malaria rather than deal with it. And people that have two copies of the mutation are more susceptible to malaria.