with graphics like that I would be surprised if you could get more than 20-30 enemies on screen at once without serious lag
also, the foliage on the ground which looks so pretty pops into view, which means you may look hidden to yourself if you hide in it, but to someone 100 yards away it looks like you're lying down in the open. if you've played the Joint Ops demo you know what I'm talking about
i just hope ofp2 has better physics and ai