That's what counts, isn't it?
The Constitution was a perfectly rational document for limited government in an agrarian time period, however, it was ill suited for fending off the exploitation of the property owners by the workers in the Industrial Era.
I think that sword cuts both ways.
Since the forefathers were wrong and the court could not keep the exectuive branch in check during both the Civil War and more so during FDR's term, I would say that the system failed. But you actually argue that because the Consitution was not taken out of the National Archive and burned, that we still have a perfectly functioning system of government.
As an aside, do you consider yourself a neo-Conservative? Who are your top 3 political thinkers?