Living in a loving and "normal" environment will do wonders for her and she will pick up on so much more than having to feel like she has to talk about it. Why not focus on having a good life together with her, and let her decide when and how to deal with her dad. Unless you feel that she is not stable, which would make a huge difference. It sounds like she is stablized now? Anyway, what I'm getting at is you have given her tools to use to help herself right now...so maybe now you let it be and see how she does, see what she wants?
I know for me, I didn't really deal with much of my feelings, emotions, etc. until after my dad died (I was 19 when he died).
Thankfully she is out of that abusive home though. Are there peer groups in your area (i.e. alateen)? Maybe that could help to have other people her age to share with and listen to.
Take care.