Good point. Metrics are based on history and even though they get updated daily the bulk of the data is dated. Responding to metrics has changed the game in a way where the metrics are no longer pointing to the correct solution. To be specific, the response to metrics made a Boggs type hitter less valuable, but the current state of the game returns that style to its prior value. If the game returned to situational hitting, the metrics would cause a defensive responsive that would then in turn increase the value of swinging for the fences which to me makes for a more boring game.
