This would be an insightful comment......except they WEREN'T. They were in a cover 3. And the reason they were in a cover 3 instead of the cover 2 was that that a cover 3 is designed to better defend against deep strikes by the offense.
This is not to say that the play wasn't well designed and executed. But believe me, when they went over this in the film room. it should have been pointed out to Dennard that he STILL made a critical mistake on this play. In cover 3 he is responsible for his deep third. Part of that responsibility is that you don't let a receiver get deeper than you. So even if you want to give Dennard a pass because he was drawn in toward Davis; he STILL have to chastise him for NOT getting enough depth on this play. If he had gotten enough depth, then he would have had a shot at recovering when Kaepernick turned to his side.
So while I see the point Ian is making in this thread, it still doesn't absolve Dennard for making the fundamental error of not getting enough depth in his drop;