LT, if you're not responsible for anything she does, then it wouldn't make much sense to try and invite her for things you do with your kids, even birthdays. While you may think it would help to keep them connected, it really keeps you on the hook. Your W has to figure out what she's going to do with regards to the kids. You'll be in the position to encourage or allow it, but not to foster or help it along other than talking to your daughters. Make sense?
I get it. You have a freedom you didn't have before when it comes to your professional life. Heck, all around in your life. Makes sense to re-evaluate. I was just checking because it came across as possibly change for the sake of change. If that's not it, then I'd say go for it! Take the chances that give you the best approach to your life. For you.
I know it is tough picking up the pieces, and hard to admit (sometimes) that it is kind of a relief to not have to worry about somebody who is depressed. But I believe you are doing a great job.
Try not to look back.
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."