yes, well, you can over intellectualise about a hollywood shoot em up.
If you want.
Ripley's idea of subverting feminity was cooked up in a man's mind, and does have sexual cues as to what might be deemed attractive by a male audience, indeed the person who dremaed up the persona of Ripley, the no nonsense bitch. It isn't the feminist role model, family criticism/subversion you are thinking of, in my opinion. It is a bit of a sham in that regard.
She might leave her pussy at home, but she has just been formed and reshaped by a man as to how a woman might take countrol of a situation, and fight with ideas of female sexuality and feminity.
Fuck this shit, bring on Hudson.