Except you are going with a hypothetical but I'll take the bait, seeing as it also goes against the spirit of the declaration of independence, although they did betray that spirit because they ignored the plight of the slaves, I think the removal of the clause of that women can’t own property or vote would be just but again the 2nd amendment has a huge part in our founding myth so its basically going to be impossible to remove. Also do you not think people in the Rural areas are safe from the wilderness? How the fuck are they going to ward off coyotes, foxes, razorbacks, bears, etc. You were suggesting a blanket ban of all firearms.
" Would they have included the second if they had known it would lead to hundreds of shootings every year?"
Also seeing as they literally just won a revolutionary war and failed to make an initial government to form a new one but the nation at that time was based on state militias. I think they would have still included that.