You know that the game is in pre-alpha right now, right? The main developer of the game is even saying that it's shit right now in it's current state. About the zombie thing, there will be more zombies eventually. They just can't add that many more at the moment before they stabilize the servers. Sorry, but the game modes that you suggested sound stupid. That's not the kind of game that DayZ is trying to be. There isn't supposed to be an endgame or an objective. That's what you are supposed to figure out what to do yourself. They still have yet to add bases, vehicles, more zombies, higher player counts, more features to do, completed crafting system, and ect. Trust me, there will be a shit ton of stuff to do.