SPD is being removed from the DSM V, is it not?

As someone with several schizoid personality disorder traits, I wouldn't say that I "suffer" from it. I am fine with how I am, and I imagine that most people with SPD would feel the same way. As for it running in the family, it doesn't in mine. However, I had always assumed that SPD symptoms are usually a result of environmental factors, not biological.

Personally, finding out if others in my family "suffer" from SPD would hold no interest for me. Seems like it would be easy to identify if your family members are loners by choice, and then just move on. How is it that significant?