They are ignoring the constitution now, why do you think they wouldn’t ignore it after it was changed? Even that makes the huge assumption that it would be changed for the better and not for the worse.
Levin's amendments are structural. First and foremost is repeal of the 17th amendment. It isn't up the courts to defend the states. Since the constitution acts on the states, they must have a seat at the lawmaking table.
The Framers got it right.
Obama has repealed Article I Section 1, which established the American Republic. There is nothing to lose and everything to gain via Article V.