It sounds like really good news to me. You are pretty much sure to get full custody, and you can set the conditions under which he sees the kids. It sounds like it could take a while for everything to play out, but ... the train has left the station and it's chugging down the tracks, just a matter of time (and money, unfortunately) before it reaches the destination.
It amazes me how professionals who deal with these kind of people (addicts with psychological problems) for a living can spot the patterns and the personality types with accuracy. And yet each one of us thinks our situation is completely unique and we are the only one dealing with this kind of irrationality.