Has your W given you any indication that's she interested in co-parenting the children with you?
That's the thing. We both came from a difficult past, and have always shared the same philosophy and acted in perfect unison when it comes to (co)parenting our children. It's been one of the strong points of our marriage. In general, that didn't change after she moved out. She has called me every single night since she moved out, so that our daughter can say goodnight to me before she sleeps. Also, I pointed out in a previous thread that, after she returned from China, my wife seems to be making strong effort to maintain a positive relationship with our son. I can list many more positives about my wife, but you get the point.
What does change is when she cycles through depression, the brat comes out, or whatever. In that state of mind, I am the devil. She acts very, very irrational, spews venom left and right, and seems incapable/dis-interested in engaging me for anything related to family matters, parent decision-making, etc... And that is the flip-side behavior that my wife has exhibited since she returned from China. Her cycling/depression seems to happen much more often, in general, but is particularly vicious when she's going through her period. For the last 4-5 days she's been in a very dark place. Her face is all gaunt and sullen alot of times. She's obviously depressed. I swear, physically, it literally appears as if there is a dark, black cloud hanging over her head. Sad thing is, my son has even become aware of the 'crisis child', and has made comments about it - like, "Why is mom acting like me when I'm grumpy?", things like that... My 'real' wife is a good, good woman. However, she's facing the spiritual battle of a lifetime at the moment.