i have long said that the 17th Amendment was one of the worst of the bad 20th Century amendments to the Constitution and we need to go back to the Senators being appointed by the various state legislatures.
But what I had not thought of was the indefinite terms. In my opinion, that is a wondermuss idea
I would like to see it pushed at the Convention of States. If we ever get a Convention of States.
No design flaw, just the 17th Amendment.