[OneWingedShark]

In looking at the last few amendments, going back to the middle of the last century, I can’t see anything real fundamental that has changed with the U.S. Constitution. If the Constitution hasn’t gone through any radical changes in the last 65 years or so, then where are these problems we’re having right now coming from?

the 17th Amendment [08 April 1913] fundamentally changed the Union; before senators were representatives of the States — afterwards they became a sort of super-Representative.

I think our present U.S. Constitution is just fine, actually.

I think there are things that really do need addressed:
(1) Taxation — namely it should be uniform with no deductions, credits, write-offs, or exemptions; also, withholdings should be utterly barred.
(2) The ability to accumulate debt (and impose on the States non-funded obligations) should be restricted.

I have amendments addressing these issues, and a few others, here.

[OneWingedShark]

Sorry, that was a link to a joke brochure; the real link is this.
(That's what I get for not clearing out my clipboard's cut-n-paste.)

[Jacquerie]

The 17th alone was a betrayal of the American Revolution.

In any republic, whosoever the government acts upon has a seat at the legislative table. The 17th set up today's tyranny.

The powers of the new government assumed the presence of the states in congress. There is no way the constitution would have been ratified if congress was composed of two popularly elected houses.

The Framers got it right.