No, no one has explicitly stated this, but modern political discourse obviously portrays this. All you have to do in a political debate is say "X is ignoring the Constitution" and the audience will automatically buy into it without actually knowing what the abuse is and the actual constitutionality behind the action in question. The "X Abuses the Constitution..." is a risk-free political attack. So no need to really say the Constitution is "perfect" out right, but its almost set as a cultural foundation that this single document is a source, an extension, and a preserver of our "American exceptionalism" principle. Therefore, to suggest scrapping it or reformatting it is almost an admission that America is not exceptional.
I really can't deal with a hypothetical new constitution as I don't know what is hypothetical judicial system acts and how specific this Constitution 2.0 will spell things out. Of course you say that Congress and the President might pass a law that violates the constitution, but as it currently exists, all it takes is the Supreme Court to "reinterpret" the clauses in violation and you move on. Doesn't sound like a working system.
I'm not saying that a single transgression makes the document obsolete, but to the point where 99% of what we understand of the Constitution is not on the actual piece of paper, but through precedents set by Supreme Court cases just trying to figure out whats "Constitutional", it might be obsolete. And maybe its not just legislation that makes this obsolete, but the whole system of representation, voting, and hell, maybe even some aspects of the Bill of Rights. You can pull this further into structural elements such as the Seperation of Powers, federalism, bicameral legislatures, first past the post voting, etc. As a note, just be cause I bring up something as an avenue to explore changing, it doesn't mean I necessarily don't like it, but to approach something from a post-modern perspective, you have to challenge all previously held assumptions (pretty much by definition). Is the sum of all our principles working the way it was intended? I think most people today would say no. Now it begs the question, "What should be done about this?" and I'm sure there will be no majority agreed upon answer.
My point being is that the Constitution, although its a good bedrock, it isn't the be all end all that politicians suggest this to be. We aren't considered the most free country in the world on a number of things (Economic freedom, civil rights, personal freedoms, journalism etc) and yet other "constitutions" or constitution equivalents seem to be supplying their citizens the guidance it needs to without a cult-like mentality.