On the 50/50 split issue. A hard thing to do, separate yourself from the wrongness of the situation, and ask yourself if you litigated what you would get. What does your lawyer tell you?
If the law there is likely going to resolve it with a 60/40 split but you spend thousands getting there, is that a worthwhile fight? If your lawyer advises that you are entitled to a disproportionate share, then that is one thing.
How long do you want to drag yourself along in this journey. I know I'm not one to talk so consider that in what I say, but you spend an awful lot of time worrying about what he thinks of you and your life together and do a lot of mindreading for the worst possible scenarios.
I doubt he is coming out of his fog. If he is, I doubt he sees his marriage to you as a big mistake. My guess, he is still running and getting this divorce is just the next attempt at making the emptiness go away because nothing else is working.
Treasur, you are a class act and no sane guy would let you go. That much is apparent for your writings here. He's sick. He's not your H. Let him go. Spend that time walking those beautiful shores, looking at sunsets and focusing that precious time on you.