I've forgotten how many times Article V opponents have resorted to empty bumper-sticker rhetoric.
“Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing ever happened.” - Churchill
I don't think it's empty rhetoric at all. I have deep misgivings of the entire idea of an Article V convention in this day and age. I simply do not think we have enough statesmen of the quality it takes to do what needs to be done without including many extremely dangerous concepts into the very fabric of the Constitution.
I could be wrong about that, but how many politicians of any stripe can describe for you a coherent philosophy springing from first principles and extended logically forward in the manner shown by John Locke in his Treatise of Government. Almost no one even knows who the heck Locke is these days, and even less know how important his writings were to the folks who founded our nation.