I'd like to propose "European Styled Gameplay" this can simply be a modification in images to a new setting.
This new setting can be as complicated as anybody wants. In summary to save your time, it'll be a new look to the game for a more European history fanatic. It can use more or less units, which can appeal to more European strategies and tactics. As a preference if this gets popular, developers should look at either a Medieval stand point (because they have as much unit complexity as the era in SW) or Ancient stand point (which have a simpler, more based upon individual units and infantries sense).