Interesting information on the rules of divorce where you live. You are correct, these rules are different depending on your location.
It sounds like separating and splitting assets is more of its own process and not tied to the legal requirements to obtain a divorce, so the is no waiting period of a year plus a day for any agreement to become binding. This is similar to my rules.
I know you are considering his proposal of custody and asset division - good for you. It is important to ensure your’s and your kids’ financial support, and well being.
The MLC spouse is very indifferent to kids, family, friends, and so on. I believe somewhere buried within them their past feelings still reside and will take a while to resurface. For the moment, and a long while, he is going to feel indifferent and behave similarly.
I find his impersonal proposal interesting. I wonder what your L will think of it.
DnJ
Feelings are fleeting. Be better, not bitter. Love the person, forgive the sin.