For the first time since he was in high school, Campbell is in the same system in back to back years. This is important because the quarterback needs to know the offense like the back of his hand.
That's why Peyton Manning and Tom Brady can go through checks at the line of scrimmage for what seems like five minutes before the ball is snapped. This is in no way to compare Campbell to the two Hall of Fame quarterbacks but it shows the value of a quarterback knowing everything there is to know about his system.
Jackson has gone from offensive coordinator to head coach so Campbell gets a new coordinator. But that's not a problem, Al Saunders was with Campbell before in Washington and Jackson's mentor in Baltimore.
That means Jackson gets a familiar face back and the Xs and Os don't change from last year.
Campbell being familiar with his personnel is equally important for the timing and chemistry with receivers. That also goes back to his checks because he knows what he can check into based on the skill set of the personnel on the field on a given play.
Any football player benefits from less thinking and just playing.
Campbell was quoted by ESPN.com's Bill Williamson saying, "When you're in a new offense, you have to always think. I want to just play and not think so much. Being a quarterback, it's better to just playing instead of thinking about everything all the time. http://espn.go.com/blog/nflnation/post?id=42752