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There's a lot of people saying that if a game copy the battle system WvWvW from GuildWars2 (example ESO) will fail as GuildWars2 failed because GuildWars2 is a zerg's party.
First I do not think the GuildWars2 failed, I know being a very successful game. (and I like a lot)
Second I'm no expert in battles but from what I saw in the movies ( lol ) the best strategy in medieval combat is keep the army united, that same way in a game, the fight with zerg is more real and more efficient.
Sure they could make something like: You need destruct three seals in the same time at diferent places while others put a gate down if you dont keep the three seals broken you can't destroy the gate. It's a more strategic appeal but that will not make everyone happy the same way.
Sorry for my bad english, Google translator is the culprit. But i wanting to give my opinion.