I have two questions.
Why should we go back to a system that the people who were experienced with obviously thought wasn't working? History clearly indicates that, even states without any allegations of corruption and toadyism, thought direct election of Senators was beneficial. Quite a few states had move to that system even without the amendment pushing other states to adopt it, and it was ratified in less than a year, which is pretty remarkable in and of itself.
What evidence does anyone have that the 17th Amendment is responsible for the reprehensible expansion of power of the federal government? I mean, seriously, other than wanting to go back to something that clearly was highly unpopular, how do we know it would make a difference? What if it makes things worse?
Personally, I see no real argument in favor of repealing it that doesn't appeal to emotions instead of logic. N one has any evidence that direct election of Senators actually results in a loss of state power, yet they insist it somehow does. Until people can point out specifically why we should do this it looks like a step back to me.
It would make more sense to repeal the 13th Amendment, since that is the one that actually gave the federal government authority to trample state laws. It is also directly responsible for the cases which you site as a reason to overturn the 17th Amendment. It is federal law, based on the 13th Amendment, that mandates voting districts that account for race. Since the 13th predates the 17th, why blame the 17th for what the13th enabled?