In my opinion, for what it's worth, it's too early to really be looking for changes in HER. Anything she would be doing ow is to try to assuage her guilt. DR says to look for changes in a couple of weeks when youre still just in the "struggling marriage" phase. You are well past this. She has already filed for divorce. I dont see how allowing her to have 'family outings' whenever she wants is going to make her realize what shes losing and stop the proceedings.
It seems to me like youre allowing her to use you as a friend and as a husband while still maintaining all of her freedom to be a single woman.