Funny, I was just reading an article about LSU and how their offense has looked "stale and unpredictable" with Cam Cameron. I know where i've heard that before.
But back on topic, my number one reason for believing the offense will be better this year is continuity. I am not here arguing Flacco is as good as Brady (except when they play each other in the playoffs) or Rogers or Manning, but all of them have been in the same system for a major part of their career. It's not secret that not having to constantly adjust to a new scheme helps players with comfort and execution. We will see if some long awaited continuity helps the offense as a whole, but I believe it will.