Given that the link between standard WvW and EotM is fairly minimal, could it be divorced entirely from standard WvW? If players (or parties) joined a random side it would serve to even out the population on each map considerably. At the moment on the EU servers Overgrowth is dominating every matchup without fail, presumably (I may be wrong here) because Seafarer’s Rest is currently green. I really enjoy EotM, but two weeks of getting zerged repeatedly by Green takes its toll.