I'm going to disagree here; that letter from that wife looked to me like something someone might post here as a first post -- before they knew much. I DO see MLC in what she says about her H, yes of course I see the controlling, fingerwagging behaviours, but so many of us do that at the beginning -- I, too, remember thinking that I just didn't have a choice with the amount of time the children took in my sitch, and yes, I, too, understood that it was temporary, even if temporary was a long time. And I, too, thought that so much was "just the way it had to be" while the children were at the stage they were, etc. Now I did certainly take the "what do we need to do to fix it" attitude, but I don't see that she isn't doing that, I see that she is floundering, not understanding what is going on at all.
And truthfully, there is so little information here that it's hard to argue.
The other thing that I don't see is any indication from Andrew that he at all gets MLC; in fact it seems the opposite -- and he quite glibly to my mind says that she can "turn it around". (S&D, I haven't looked at that site, so maybe am not so well informed...)
I'm not at all saying that she doesn't need to do mirror work, quite the opposite, but I wouldln't be so quick to condemn her.