They went from as many as you like, to too far. Bring it down to a realistic distance. Then make them impervious to friendly fire, instead, perhaps have a regional vote that can be poped up (once every 1,2 or 5 mins?), where if you select deployed sunderer, vote to close it up if it's not in a right area. Outfits would always win this but better than having them blow the other one up anyways..
