I feel like all they have to do is ramp up the survival aspects and difficulty to survive. More zombies, harder & faster zombies, LESS LESS food and water, etc... Make it to where you actually have to fight to survive and you have to work to stay alive. When it is harder to survive, people will be more focused on that instead of pvp so much. Its way too easy to fill your backpack up with food and water, and then all your survival aspects are gone at that point and all you have is a game where you avoid zombies and just shoot other players.
