After denial and distraction (several months of) wore off, my H's mood problems seem to have gotten worse with many cracks showing. They may be on an agitated anger high on the way out the door and then it gradually gives way to depression as the continued drudgery of work life and financial stress (and in your case coparenting) sets in.
This board is full of tales of WASs falling to absolute pieces within the first year or two. It's sad.