I for one hope this simply leads to the end of marriage. That whole concept is built rather one sided. Time for relationship contracts... renewable, but always finite. With separation details worked out in advance. Let's get religion out of it entirely.
Why does it need to be a formal contract? People can engage in relationships without the law being involved. I tend to think we should disentangle marriage and law, have some paperwork one can fill out for the legal affairs like hospital visitation and such that can be changed without the same degree of court proceeding, and have the religious or cultural ritual as just a ritual people can but are not obligated to hold if they feel like with no legal meaning to it.
Well it doesn't have to be a formal contract... but I was thinking there would be like a website with a selection you could pick from, print out, sign and done. And the main reason was to make getting out of a bad relationship clear easy, and most likely no courts involved since everything was already spelled out. Open sourced contracts would in theory be well vetted to be fair.