That would be an improvement over the current situation, yes.

Ideally, joint assets remain joint and there are no claims against future income.

Except where there are kids involved this is almost entirely the case in the UK so I struggle to see the reality of a world that's different.

I guess it's rather unfair to the stay-at-home husband though, who's given up his career to look after the kids, and thus has lost 10 years of continual work and training out of the job market. When income differences are extreme (say wife on $150ka a year and husband having given up a high paying profession 10 years earlier), it would make sense for the husband to get a 'get back on your feet' sort of stipend.