There were a few weeks last year that I slept in the office and then she slept in the office. Since the beginning of this year we have been comfortably back in 'our' bed.
If W is really convinced that separation is what she needs, I don't think that separate rooms would be sufficient. Honestly I think it just makes for an awkward situation. I would still be there to help both physically and emotionally and she for I. I don't think that it would get her the distance she is looking for. I don't think she would really get the chance to miss me.
I'd rather not go down the path of separation, but if we do, I don't think an in house separation would have the desired effect.