You think we could win with Peyton Manning as our QB? Not-a-chance. Only thing putting Ganz in will do is red-flag our play. Keller is not the problem. Ganz is not the savior. Anyone else watch them in the spring game? They played fairly close but it was obvious that Keller had the edge, and that's why he is starting.
When your OL can't keep pressure off you, your receivers can't get open, your receivers TE's RB's consistently drop passes, it's damn hard to have a productive offense.
In the face of all that Keller has led this offense on quite a few productive drives, but rarely do we finish them off. OL mistakes, dropped passes, penalties, bad calls all contribute to this. And yes, Keller does throw some bad passes which contributes. But his completion percentage, considering the number of dropped passes, is impressive.
My main beef with keller is that he seems to check down to the RB way too early. I've seen countless times when he's got single coverage or an open-man down field and he dumps it off to lucky. But, I think that has more to do with not having confidence in the receivers. I mean, he has to have some memories of prior plays where the open receiver dropped the ball, or no receivers got open on that particular play so he pretty much decides to check down before the play even starts.
No, Keller is not the problem.. Ganz won't do any better. With the inconsistent play at OL, WR, TE, RB... it would be impossible for ANY QB to consistently produce.