I edited the piece according to your advice, along with some other changes I've gotten from people's feedback. That AA tip is particularly valuable, I think. Thank you!

You don't need to AA 45 degree lines like the one in her cleavage. Doing so just makes the line look blurry and thick.

Her upper arm looks a bit strange getting narrower in the middle like that, I think keeping a more consistent thickness would look more natural.