You are absolutely correct. State level action is the best way to proceed. (Some states better than others).
Consider adding a repeal of the interstate commerce clause and a clause prohibiting the Federal government from restricting or requiring personal economic and commercial transactions to you excellent list.
“Consider adding a repeal of the interstate commerce clause...”
I would submit it needs to be carefully controlled, but there is some good original intent in there.
‘Congress shall have power to regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes.’
I think this was over-interpreted because it was originally under-written in the constitution. It should be expanded to explain its intent more fully. Ironically, the Indian Tribes suffer terribly because they have an absence of federal commercial law—they cannot invite non-Indian corporations onto their reservations, because they would operate in a legal vacuum.
“...and a clause prohibiting the Federal government from restricting or requiring personal economic and commercial transactions...”
The direct national government interference with private citizens began in earnest with the 16th (Income Tax) Amendment. If that, and the US Census were reformed to eliminate the personal interaction, as well as a database and surveillance limitation Amendment, much of the nonsense today would be eliminated.
That is, it would in effect prohibit direct taxation of individuals by the national government, as well as direct payments to individuals, other than in the form of government employee (and military) pensions.
We, everybody, need ideas of what can be done in a constitutional convention. Such ideas will be tempered in the fire of debate and argument. But such is the need, and such is the capabilities of the American public, that our common wisdom and historical hindsight, gives us the right.