I've made several attempts to replay AvP 2010, but never go beyond the first level. It feels slow and jerky, with the 60 FPS limit, lots of mouse lag, confined FOV, motion blur and being uncomfortably dark. Alien Isolation proved that a game can still be scary despite being able to actually see things. The lack of crouching isn't a big deal in itself, but is a prime example of the lack of fluidity. It feels like a console game, in the worst way.
It's a shame, because the art and design in that game is spectacular. I'd love to experience it again, but the fundamental gameplay system is a prohibiting factor for me.