There are already plenty of restrictions. The question remains -- how many more and how severe. The best thing that came out of this case was affirmation of an individual (vs collective (=nonsense)) right to "keep and bear" arms. Now, it's going to get down to the definitions of "keep" and "bear". IMO, licensing will be the next big hurdle. Is a license required for any of the other inalienable rights? Answer = NO!
I think you’re on the right track, and your yardstick has a very straight edge. The treatment of the Second Amendment is different than that of any other right.
Let’s start asking if the civil rights related Amendments need registration. We’ll see how far that that flies.