A couple of my more cynical friends have commented that this may just be code for 'we're releasing evil/neutral companions first because that's what we have the most experience writing'.
I am inclined to be even more cynical and say their intent is ultimately to release only evil or neutral companions, with just one TOKEN good companion who, because he is high-profile, makes people feel (falsely) like there is balance between the evil and good sides.
Bottom line for me: if my choices are playing with an evil party or playing with a custom party (with no personality or say about anything), then I will do neither and simply not play at all, because both those options are equally intolerable and unacceptable to me.