Personally, in relation to the claims of sexism, I've gotta say I found the way my Warrior could treat Quinn and how he subsequently responded to be a whole lot worse than how she could treat Vette. I have to take the collar off to make any progress with Vette's story, she would say something negative if I was being cruel to her, etc., but Quinn? I ended up married to the guy I frequently sexually harassed when he clearly was uncomfortable with it, threw into a wall and force choked, constantly held one mistake over his head and asserted my dominance and superiority at every turn, all to which he replied something along the lines of "yes, my Lord, you absolutely have the right to do whatever you like with me, I'll do my best to please you above all else." Pretty classic abusive relationship there; I don't know if it's as bad with Vette, not having gotten as far with my male Warrior yet, but her personality at least doesn't seem as likely to put up with as much, thus far.
And, y'know, I'm ok with this. Is it absolutely a terrible way to treat any actual person, male or female? Yes, no question. But I'm playing a character here; nobody's forcing me to make her act like this, nobody real is being hurt, and at the end of the day, the message I'm going to take out of this isn't "hey, being an abusive jerk and coercing sex out of people is actually pretty fun, I'm gonna try that on my next girlfriend." It's more like "that was an interesting mindset to explore, a fun character to play, but wow, she really was kinda unbalanced." Probably because, y'know, she was a Sith. And I can't imagine a male Warrior + Vette is going to lead to any significantly different conclusions for players.