The valor points that you gain when you kill a player should be divided by the number of players that "helped" in the kill. This fixed amount is encourageing people to always zerg along. You can't even find 4man or 8man walking arround because there is no reward of keeping a good group together... It is better rewarding to stay on zerg buffing than going outside with your own group to hunt for ppl.
Zerg will always exist, but it's purpose is to kill the enemy zerg or overcome some objective... not farm valor points..