OP, it looks like you've put a lot of careful thought into your proposals. I don't know enough about what all the abbreviations mean, etc, to comment much on them. But I can say that at the root of the problem is lack of trust. All the way back to Howard Mezzinger(sp?) of Ohio, several decades ago, it was openly acknowledged by gun "control" proponents that their laws would do little to no good until they could "ban them all". Since then they've been more subtle, but now we have Robert Francis O'Rourke, who only last year adamantly assured voters that they could keep their AR-14s, abruptly changing his tune and saying, "Hell yes, we're going to take them". Yes, he is desperately trying to keep his bid for the presidential nomination alive, but many believe he is finally being honest. Confiscation is the end game of the gun control lobby. And knowing that makes the other side appropriately obdurate.
If we had more trust, we could get further with legislation. But then, if we had more trust in our society, there would be less need for legislation. There would be less violence. The family would be more intact, kids would be brought up by parents rather than schools, and we would be a happier and more godly society.
Until that happy day, I consider gun ownership a vital part of self-defense, and I look with extreme distrust on attempts to limit that right.