I'll agree that Armageddon/World Party were much better than Open Warfare. But a handheld version of DS is win nonetheless.
I just don't see why they cut out so many weapons.
This is just a theory but I'm guessing it has something to do with the radical censorship we've been seeing these days, like the Baseball Bat and Old Woman being examples of
EXTREME VIOLENCE and the Indian Nuclear Test being racist or some nonsense.
...man that'd be crazy if it was true.
EDIT: Also the AI in Open Warfare 2 gets pretty damn silly sometimes; if you've got a WiFi connection you'd probably prefer playing against humans than lolAI.