Impeachment and follow on trials of judges were hardly necessary before the 17th Amendment. Checks and balances worked. They haven't since the 17th.
No impeachments of either judges or high Obama officials will happen because it isn't in the personal, electoral interest of individual senators. Say “impeachment,” and a world of hurt will fall on the errant senator.
The only worthwhile amendments are structural, like the 17th itself. Like the people, states are members of our constitutional republic and MUST have a seat at the legislative table.
While I agree with you wholeheartedly, by the time the 17th Amendment is repealed, there will be no republic left. It is also questionable if it can be repealed. Many people have fallen for the mobocracy deception and think they control the legislators to get whatever they want while the exact opposite is true.
I fear there is no way to restore decency without first destroying indecency. If we tuck our tails because we fear the word “impeachment” and lack conviction to remove tyrannical judges, then I would suggest that moral decent America is done and good riddance. The sooner the fascist state collapses and is destroyed, the better.