Ok, here's a gripe I've not really seen mentioned. Does the game just feel "empty" to anyone else? For an online multiplayer demo it seems very detached, no sense of interaction with other players, almost like being on a server full of bots on CS:S (though at least then there's the radio chatter).
Considering the earlier AvP games were so atmospheric I just feel cheated here. There's no suspense or tension, it's just run until you see something, hammer mouse1, repeat.
I hope people can tell what I mean, despite the disjointed and poor description. I'm just going to slink away for some much needed sleep.