Used to be that states elected their senators by their state reps. And they could recall them and replace them if they violated the states rights, that changed when leftists passed a constitutional amendment
Of this I am quite aware, although it was Hamilton assertion that Senators could not be recalled.
Hamilton wanted senators to have a bit of an aristocratic flavor to them. Possibility to keep them above the politics, just as likely to make them less securely the defenders of state solvency they were meant to be.
If we are to repeal or otherwise nully the 17th amendment(under the article 5 section respecting senators) we should try to alter that mix, to insure recall.
Of course with respect to modern technology it might be possible to just do away with the senate and instead go directly with the Governors. That is if we could be sure that every State would maintain a Constitutional setup which has a Governor.(we can’t)
Suppose one of our States should decided to embrace a parliamentary model with a prime-minster. As Nebraska can eliminate its duel chambers so too could anther state find away to get rid of its Governor position.