I was glad to see this. It would be nice if everything was ideal. Sometimes people get married too young or because they have to. People change. Sometimes they change and they grow apart, not together. It seems to short change both parties if they stay together, because neither is really happy. Better to part as friends with a common interest (the children) than to just let years wear on and the bitterness just continues to smolder.
You said an absolute mouthful here. I can't tell you how many families I know that would have been better off parting in the interest of the children.