Setting aside for a minute the current question, one of the (big) problems I have with these modern (or post-modern) definitions, is their presumption to define in a clear cut way things like "meaningful personal relationships".
This isn't trying to define "meaningful personal relationships." They use language like that (and "extreme egocentricity") to a necessary level of vagueness, because everyone is aware that, unfortunately, there is no crystal clear, quantifiable metric readily available for purposes of diagnosis.