Having the State Legislature choose our representative, as opposed to us, also stinks to the highest heavens of a "government knows better than we do" mentality to me, to be frank.
The same people will seek a Senate seat, whether it is the State legislature or We the People who choose them, and they take that same mentality to Congress with them.
That's not necessarily true. Running a competitive race for the Senate these days takes an extraordinary amount of money. If legislatures were electing senators, someone who wanted to be a Senator would only need to make the case for their candidacy to the legislature. Any direct appeal to the population in regard to U.S. Senate elections would likely only involve trying to get certain candidates elected to the legislature.
The end of popular election of senators would allow distinguished community leaders, who may not have massive financial resources, to be considered for Senate seats. Senators could then be chosen for their commitment to the principles adhered to by the community and the legislature, and the legislature could hold them accountable.
The difference is, now we can "fire" a Senator who isn't performing their task to our liking.
Change will come at the voting booth, and at the mail boxes of our Elected Employees in the Senate if We the People are willing to get off our collective keesters and canvas our Elected Employees.
How often does this happen? Congressional incumbents are typically re-elected due to public ignorance, vote fraud, or both. Do you think your Senator actually cares what you, as one voter, think? No matter how much you protest against their actions, unless you're some major media or political leader in your state they probably don't care because you can't do much to damage their campaign. If they lose your one vote, or even the votes of you and your family and friends, what do they care?
However, if they had to answer to a legislature composed of about one to two hundred members, in a situation where one individual legislator has the potential to influence the floor debate, they would be far more likely to care what one individual legislator thinks.
As far as how the people relate to this, you're much more likely to be able to influence your state legislators than you are any member of Congress. If you want to, you can probably call or write your legislators and get a personal response. And you, as one voter, probably can make a significant impact in a state legislative race if you expend the effort.
So compare the two situations:
1. You as one voter among millions try to influence a senator.
2. You as one voter among thousands try to influence your state legislators, who as one legislator among hundreds try to influence a senator.
In the second situation, the people and the States both have more influence, and the States retain their political sovereign control over the Senate.