I was thinking maybe have a new map that is not Earth, maybe a map that is designed for a specific gameplay style like
:: King of the Hill - Each player starts at the edge of a balanced designed map and fight their way to the top of the hill (the center of the map). Capture and hold the top of the hill for x amount of turns to win. ::
I'm aware there is a game mode where the objective is to capture a specific city but the current map, Earth, is just an imbalanced map to play this game mode. Players would start ridiculously close to the target capital and rush it, which is probably why no one plays this.