There is no "should". As I said, it is a matter of opinion. You stated that you felt the game has no imbalancing issues. In that case, why would you use a "balancing mod" if you felt it added nothing to balance. The point of cbm is for people who felt "Hey, some of these pretenders/troops/summons/nations don't appear to be costed right ..." or "Turtlegemgenthreehourmicro" is not fun. If you have none of these issues, then why use it?
