Is the OP really trying to say that team vs team "combat" originated from FPSs? I could be wrong but I do believe this kind of "combat" started in stratagy games idk, like Age of Empires or Warcraft.

So no matter how much it's appent you hate FPSs. PvP didn't start there. And as for my opinion, I might actually like this kind of PvP. Small team PvP just against each other isn't what I like. This is a king of the hill type game where the PvP sound to be less important then defending locations.