Well, I'm not Sandi or Coach, I know that much. We too are in separate rooms under the same roof. Sadly, it's been like this almost a year. It started as a 'sleep with D till she's used to her big, girl bed" Now ou D can't sleep alone. Wasn't good for D or the M.
As far as eggshells, I know that feeling but I'm not getting the fighting at home. I've got other games, I think. I'd defer to Sandi/Greek/Coach/Puppy etc. My opinion and what I've tried to do is make sure D is looked after and entertained; do my own stuff (laundry, etc) and speak when asked to. I initiate nothing unless it pertains to D. I just deal with my stuff. And try to stay content and involved inmy own stuff.
If she starts going where I don't want to go, I stop looking her in the eye. I give it a minute. If it doesn't change, I apologize and excuse myself for 'something'
It seems to be working (for me) as we don't really have any hostility. But that's not to say it won't happen. I'mguessing it may if we get closer to Sep or Div. Right now we're sort of limbo. The only thing that drives me crazy is that if we could have related like this 2 months ago, we'd wouldn't be considering divorce as "today" is better than two months ago. But NOW we're talkin D? Makes no sense.