I am in favor of upgrading the OL - a high football IQ is not required to see that they are deficient.
I think this leads to the frustration to make a change, any change, in hopes that the result is different. This seems to be a fan reaction, not a coaching reaction.
I suspect that Teller is not ready to start yet even if he had a strong college career. Many college stars are not drafted or perform poorly in the NFL - it is a different game.