The campaign so far does have its problems here and there, but I can see it has potential.
If I could suggest anything I wish they'd change the ladder in map 1 to an actual ladder prop and not a confusing brush-based one. Plus, I think a lot of people are confused about the ending-how the hell do the survivors know that there's a rescue if the helicopter crashes at the beginning? On top of that, the location of the chopper at the end is weird. Why have it so far up in the air, behind trees, where players can't even see it? It would be better if it was in a clearing, hovering closer to the ground, where the player can see it.
The actually editing is brilliant, I can't fault that, but the name of the campaign?
Cold Stream doesn't sound very menacing at all. It's sorta like "Shallow Puddle" or "Uncomfortable Road". I mean, with the actual Dead Air campaign, you know you'll be dealing with planes and dead folk. So far with Cold Stream... I'm imagining crossing a Cold Stream as the crescendo event :L