Point #6--the 72 hour time limit. On this one I'm going to take a hard no. The regulators need to get off their asses and fix whatever's slowing things down.
I agree. Frivolous applications to own a gun that has no real purpose - sport, hunting, or vermin control - should be denied quickly and without delay.
Applications to own a gun for personal protection or home defence should be automatically refused, not least because guns are absolutely unfit for these purposes, and anyone deluded enough not to understand that is not someone who should be trusted to have a gun license at all.
If you're planning to shoot inert targets, game animals, or pest animals, then perhaps you might be a fit person to own a firearm. If you're planning to shoot at humans, then you had better be joining the armed forces or the police. And if you aren't planning to shoot at all, you don't need a real gun at all.
I know you will argue that my reasonable suggestions are complete impossible to implement, because politics. But that's not actually true - 95% of humanity has done it, and there's nothing special about US public opinion in this regard. Where politics is directly antithetical to public opinion, politics can go fuck itself.
The problem is a tiny but cashed-up and vocal minority. In any kind of democracy, that's not a sufficient barrier to cause sane people to simply give up.