Great stuff PP, I think it all looks very positive. Its obvious she still has an attachment to you. You owning your mistake is a big deal. I don't see an issue with you talking with her and opening up, honest communication is fine. I would just let her lead with the questions as it seems she is interested.
I think I'm at a similar place and understand why you want to just list the positives and not think about them too much. Its hard seeing small signs of things moving in the right direction but still leading to D also. It makes detaching and letting go that much harder knowing things could work out but its just at the end of such a long road that the path through it seems endless and full of pain.
Regardless, you are a success story no matter what happens with W at this point.
Accept what is, let go of what was, and have faith in what will be