Good suggestion, I'm going to try it. I like the part about calling her BS on splitting the holidays, I hadn't thought about it but yes that's exactly what she's doing. She keeps pretending that this is all normal and it won't have any effect on our kids.
I think it's going to piss her off, but since she wants to get into this I wanted to propose something instead of just passively accepting whatever she proposed. She's used to doing this, and I've allowed it all this time in our M.
The "exchange time" is a bit weird, we still live in the same house. The vague plan is she's expressed some interest in getting an apartment, but as far as I know she doesn't have one picked and she probably can't afford one. That's why this discussion about the holidays is kind of pointless to me at this point, as long as we're in the same house.