Sorry about S6, its so hard when they are miserable. Glad you took control (You are Daddy!!) and handled it. That will surprise W.
I am getting to the point of knowing I have to let H go, or at least let him know he is free to go. I have to realize that he might not come back (or even stay with OW) but if he doesn't go, he'll feel trapped and nothing will change. How sad.
Our situations are similar (same timeline for A's, although I see you aren't sure hers is PA), and our kids are the same age except mine are girls.