I really liked AvP3 in pretty much all aspects of it. The game had some problems, but it was loads of fun as well. I really wish the multiplayer had been more balanced, but I was able to still enjoy the mulitplayer.
A:CM isn't a good game though. I got some fun out of it, but the multiplayer is utter garbage. The Xenos don't control well, and it's just lacking in options. It feels just as unfinished as everything else, and I'm not going to waste time on that kind of thing. There are better games to play with better multiplayer experiences.