Hi Stepmomma,
I don't think poorly of you for feeling a sense of relief that your step d is moving out. It will bring some peace to the environment that you dwell in and that is something to be grateful for.
I agree that the role of parent is not yours to take on. Step kids will often through back in your face the efforts to help guide and direct them even when they ask for your help. Being more in the "friend" category works better, and then sometimes our step's reject us as well.
I'm glad to learn that your husband has such good skills! I hope that you will also pick up on them as they will serve you both well with each other and all the other people in your lives. When things get tough with his daughter having the validation from you would mean a lot.
lbj