I am right there w/you. I agree, MLC is not mental illness. It is definitely a life transition that blew up because his xw didn't complete her quarterly transitions properly and eventually couldn't cope w/everything that hit all at once, i.e. childhood issues, stressors in her life, etc. It was a combination of events and they had to bubble up and spew forth.
Mr. Bond, we all hope that they can get back on track at some point. Unfortunately the marriage ended up in divorce, but that will give them an opportunity to start fresh. However, if she returns a far better, more settled woman and Cld hasn't made the necessary changes within himself, the relationship will be doomed once again.
BTW, I still don't think his xw is in MLC, but a WAW who got tired her life as she knew it. Cld has not described much of anything that she's done differently, except she walked out, took the kids, filed a restraining order on him, filed for divorce and accused him of being controlling and abusive and had to have supervised visits w/his kids. That fits a WAW as well. Of course, we would use the DB in the same manner as you would a MLCer. However, this is my personal opinion of his situation based on his postings.