I agree with repealing the 17th. How the states let go of this power is unfathomable to me. It was a wholesale destruction of state powers and a huge leap in destroying states rights, which is what those advocating a powerful central government want (it’s easier to rule over the people that way . . . ).
Anyway, the specific reason as I understand it for the 17th amendment was to broaden democracy, and counter what had become a fairly corrupted process at the state level, where people could buy senatorial seats by bribing the legislature back home without the world finding out about it.
Somehow, fools like Teddy Roosevelt thought it would be cleaner if the scoundrels bribed "the people" directly.. Go figure.
Now, in the age of pervasive communication and news coverage, it would make good sense to restore the elements of federalism that were sacrificed back then, and strengthen the people by decentralizing power.