You really would have to overturn that ruling for a repeal of the 17th to work, since otherwise, you’d end up with a bunch of Senators basically representing corrupt big cities.
You would probably have to repeal the 16th and the Federal Reserve as well, for repealing the 17th to work, so that the Federal government wouldn’t have as much money with which to bribe state legislators.
I'd like to see a proposed amendment to correct Reynolds, although I'm not sure that would fit the authorizing language.
The abolition of the Fed could be done by Congress tomorrow. That doesn't involve changing the Constitution.