Good Points. My Idea was to have each of the 6 above themes be limited to a single division. For example, the NL West would be based on Golden Age and all teams in it would follow that theme. That way you have a Divisional champ from each decade. If you notice also, I excluded the Deadball and 1920s which take care of the Joss, Johnson, Alexander, Ruth issues. Also the 90's which solve the Pedro/Maddux issues.