As you have already noted, in many ways it does get much better when they are gone. My H left abruptly, but I now realize just how depressed and emotionally withdrawn he was, and how that was affecting everyone else in the house. In many ways, not dealing with that on a daily basis has made life easier at the moment.
That being said, the change in everyday life is in itself a major adjustment and will take a while. For now, just try and focus on the positives (not having to worry about her mood or stress).
You'll have some down days - when some of the routine is gone, there's certainly a noticeable emptiness around the house. But it will get better.
