This is one of those things where things probably need to get worse before a constitutional amendment would be proposed and passed, unfortunately. I mean is even the serial number requirement constitutional based on that supreme court ruling?
The problem i see as a gun owner is that the longer sensible gun education, sensible laws and sensible programs surrounding firearms aren't in place, the higher the chance of insane laws. Someone is going to "lose" and someone is going to "win" and it's become so emotionally charged that it won't end well for anyone.
A problem is that the gun lobby is against even those basic laws of requiring basic gun safety like gun storage and they have a huge influence. I would be fine to start to require those basics and see how much that improves it. It would be a step, possibly a large one, in safety.