Every time I read about you & your W... I just get the sense that there should be some hope there. Sorry if that takes you down the wrong path. But I just intuit that your W -- despite what she says and "almost" moving out -- she's got some feelings that makes her not ready to implode your family.
The other thing is -- I think you have to think hard about what MWD says about cheeseless tunnels. You've tried *all* kinds of stuff to DB. I think you have to think hard about what works. You have the luxury of trial & error ... many of us do not have that.
My $0.02's worth this morning.
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final