It might be a Pyrrhic victory for the feds. They get the ruling they want, but it just pisses off freedom lovers and state legislatures even more.
Besides, there’s the never-addressed conflict of interest issue. How many states are going to view as illegitimate the ruling of a branch of the federal government, in favor of the federal government? Perhaps state vs. fed issues should be decided by a panel of jurists from other states.
Interesting idea.