I agree with Drew in that I believe you will indeed get extra time with the kids.
Just a bit of advice - I know you are venting, and maybe you need to go through an anger phase about the whole D, but it will serve you well to not focus too much on the things that bug you. And dont let what you XW's life is now affect you.
Just keep being the great dad you are for your son and daughter. The knowlege and honor you will imprint on them is beyond value.