I replayed the game recently, decided to collect whatever achievements I could in single-player, since ranked matches in multiplayer are nonexistent and so those will remain out of my reach.
While I have enjoyed a lot of things, I have to say I'm not fond of the Predator losing his cloak every time he attacks in melee. Previous games had you stay invisible and I liked that more. Another complaint is not being able to collect skulls from your kills manually rather than through specific executions and not getting a chance to hang up your kills, skinned, by their legs and leave them for the human enemies to find them.
I'm not sure why they removed the Xenomorph's vision from this game. Didn't mind it as the above-mentioned things, but still, I would like to have known their reasoning for it. The Xenomorph campaign was decent, but really short when compared to the others. I guess that's just because there's not much to do other than stalk and kill as a Xenomorph, whereas the Predator and CM have more concrete, more fleshed out goals.
Marine campaign was f**king great. Absolutely loved the first two levels, probably my favorites from the whole lot.
If they do another AvP game, I hope they don't continue where this one left off. I really have no desire to go to the Xenomorph homeworld. I can't really put it well in words, but the setting would really rob me of the joy to play there, not to mention the mystery around the Xenomorphs would be compromised by it.