I think your statement makes it clear you still don't understand the process. This bunch of people in a room have no power to change ANYTHING. The only thing they can do is propose a change and that is it. Then WE THE PEOPLE get to decide if anything becomes part of the Constitution. It takes three fourths of the states to ratify a change. Good luck getting anything even remotely radical to pass that bar.
I understand the process as you have defined it, and I disagree with your assessment.
We are merely discussing theory. The only time this has been actually tried, the result was a completely new constitution irrespective of what the old one stated.
‘A republic, if you can keep it.’
Be warned and beware.