I think the plain language of the amendment as posted here suggests that whatever relief is granted must be granted at the time of the decree of divorce. If that language had not been there, then it would have been left to interpretations. So, if the decree is passed then thats it. If appealed, it is still too late because the time of passing the decree has passed by the time the appeal is filed. Also, it is unthinkable otherwise because the trial took place with one law in mind and an amended law cannot be applied in appeal. The argument that DV was applied retroactive is not applicable here because DV was a new Act not an amendment.
In any case, like any other law or amendment, it will stabilize after a few Supreme Court decisions come out... But the presence of simple language is important to anticipating any arguments. The plain language cannot be overruled by the Supreme Court. Some words appear to be noise but have a lot of significance. The "at the time of passing of the decree" is a very important clause.
I am NOT an advocate but I think this is more a case of language interpretation. Also, we are yet to know the final language. It can get changed along the way if ever it become law... Shh... Quiet! Lets not wake the ladies up... There are loopholes in it!!!