Sucks what you are going through. I have my version as so do all the others. I am curious though from reading your posts. Is your wife sharing her indecision with your daughter? I sounds like your daughter is on the roller coaster with you.
I have always thought that if I get to this point my daughter will be the last to know that wife and I are moving back in together. It's hard enough for me.
I came to that appreciation after my life as a kid in an ugly divorce and friends of divorced parents. Most kids spend their first year praying or wishing that parents will get back together.
My wife has justified a whole lot too. She even wrote a poem for daughter's play that talks about being on a journey. LOL! I wanted to throttle her and say the only reason our daughter is on any da@# journey is because you tied her to the wheel of the bus!
If your wife is sharing her indecision with her, could you ask her to appreciate that boundry and not talk to daughter about it until you guys decide how and when you will do it?
I told my wife in one discussion we had - "I am not saying I want to reconcile but if we did then I would want..." Don't know whether I should have or not but it didn't start an argument. But I didn't want to make it sound like she had me on the shelf waiting for her because either. And as of now she may not.