I agree that there's no "new info" in the chronicles, but they do help explain events that will most likely occur in the game. We know we're going to Dxun and Onderon, so we'll have to fight the best tamers and other tribes that live in the jungles, as described in the chronicles. Also, this is verified by one of the IGN articles describing their play through... So the chronicles aren't ompletely useless, and I'm sure there's plenty more in there to tie to the game.