Electing "better" Senators would be the overall result, of course with exceptions, if the matter were done by state legislatures. But there is another reason to replace the election of senators into those legislatures in which is to restore the federal system, to make state legislators power players against the federal Congress.
I am not naïve enough to believe that state legislators would be less corrupt than federal legislators, I simply maintain that they would be corrupt in a different way. After all, I am a conservative and I have a very negative view of human nature just as did the Founders and I would adhere to the Founders' solution which was separation of powers. Certainly, empowering state legislatures would go a long way toward accomplishing that proven method.
I say again, what we're doing now is not working and, even in Texas if it is broke, it should be fixed
A century ago, the people discovered, and rightfully so, that the system of the legislatures electing Senators wasn’t working. The Founding Fathers plan for their election ceased to work before the mid-19th century. It had become a corrupt and out-of-touch body and a thoroughgoing joke by the turn of the 20th.
For whatever flaws we have now, I’d rather have my right to elect a Senator not be taken from me and given away to empower politicians, for whom are already far too powerful.