Glad to hear you got out of the house without incident or unnecessary drama. I think you handled your departure the best way you could under the circumstances.
You need to forget about what your W is doing or saying right now. When I think about my current sitch, one analogy that works for me is being adrift in a lift raft with just my family. My W has guzzled a bunch of saltwater to quench her thirst, gotten delirious and has jumped overboard to swim to a tropical island that doesn't exist. She is gone, now it is just me and the kids and they are counting on me to pull them through this mess. The same applies to you. You are putting distance between yourself and a very dysfunctional situation/person for your own sake and self preservation. Some of what may be behind D8's positive reaction to your move may be due to some restoration of order and calmness to her life which you will be able to more effectively provide being separated from your W.
From what you describe, it also sounds like you may be starting to emotionally detach from your W, which if so is a really good thing. Once that happens (total detachment), you are going to start seeing things very objectively and you may not feel so sad when you do.
Hang in there my friend.
M: 41 W: 39 S: 11 S: 10 D: 4 1st contact w/OM: 1/19/09 EA began: 2/14/09 EA discovered: 3/1/09 I file for D 8/25/09 to protect myself _______________________________