First of all to expect Cam to be as good as Brady, P. Manning and Brees in his 4th year is expecting a little to much. He may never be as good as those guys because quarterbacks like those guys are super rare. Cam is easily as good as Ryan, Stafford, Luck, Wilson, E. Manning and Rivers if not better than some of them.
Does he have his faults, sure he does, and he may never be as good as Brady, P. Manning or Brees when it comes to passing. That doesn't mean we start looking for a new quarterback.
Cam has helped us win games that we otherwise would not have won had he not been our quarterback and we still had Clausen or Delhomme. Give him a few more years and I think he will become a better passer.
Ron and other coaches know that you can't win just being a running quarterback. That's why they have been working on getting him to be more patient with his reads instead of running the ball.
Be glad we have a dynamic quarterback that is only going to get better instead of whining and wanting to replace him.