This is a tough one. I lean a bit away from "strict" DBing personally, so do take what I say with a grain of salt.
From what we know, your wife is WAW, not WW. I do think there is a slight difference.
I think putting a timeline on a separation is not a good idea if you went down that road. Emotions change quicklyk and just declaring an arbitrary end date won't make it better. What happens if 3 months in she starts reconsidering, but has too much pride to talk to you? What happens if it is 11 months in and she feels pressure - which may push her away? Just my two cents on that piece.
The fact that she mentioned eggshells is interesting. I think many of us know that feeling with our WASs. It's terrible. You don't feel like a full person, you don't feel like you have control, or that you matter.
The thing about walking on eggshells is that it isn't just "oh, S is being abusive/domineering/mean". My W had a strong personality but I never once was even remotely close to being afraid of her. In the beginning of our R I would stand up to her, but I got into this bad habit of just retreating instead. I had the eggshells feeling because I didn't want to rock the boat and put myself on the line by asking an uncomfortable question. In my own instance, it was about ME needing to take up more space.
I say this because it is my feeling as a woman. And from what you've said, she's feeling the pressure at having another child at a time that wasn't quite right for her. And the wanting a S is her cry for space. Coming home to a few hours of alone time is not space. I've been S for 2.5 months and only now do I feel strong again, like I can take on the world.
I don't know what your best course of action is, but I do want you to consider if these feelings might be where W is coming from. I think having some idea of where your W might be coming from is a strong tool. And I could be way off - this could be a ploy to get what she wants. But that's why I say WAS vs WW - from some folks' sitches it seems a WAS needs to be seen and heard, but a WW has affair fog to make them more insane.
continue what you're doing, and make note of what works. You got to a point of having a calm R talk after W was angry. What brought you there? That was a good de-escalation.
