Well, this is way outside of my area of expertise and it's possible that was just a very poor word choice. When I think of a sociopath, though, I picture someone charming and charismatic who manipulates situations to get what they want (boardroom or bedroom) and doesn't take feelings or consequences into account. Granted, the worst of those aspects were mostly the "old" Tony and a helpless (dying) Tony. And, as I said before, a very poor word selection may be to blame.

*as my rabbit daemon is frantically rushing toward a hole to hide in and disappear*