Let me clarify. The spouse that wants to 'get up and leave' shouldnt have the ability to take the kids with 'em.
If the spouse is requesting a divorce because of reasons such as spousal abuse, affairs, and other legitimate reasons for getting a divorce should clearly have the ability to fight for and get the kids.
But when a spouse decides to just cut and run to head for greener pastures, the spouse should not be able to pack the kids along.
Who is going to make all these determinitions? This is a can of worms. If it's "no fault" then it's no fault. You can't have it both ways. You're saying the one who "leaves" (whatever that means) is at fault and deserves nothing. Does this mean leave the house? What if one just stops paying the mortgage/rent and they are both evicted. Then who leaves?