Well that was all around amazing. That was a fairly long trailer too and showed off a huge amount of environments, the game looks sprawling. I'm guessing its not going to be a true open world and more so gigantic interconnected open areas, maybe each one with its own human tribes giving directions and stuff. Sort of like how Kingdoms of Amalur set it up where you don't really need to return to the past areas unless you just want to finish up quests or destroy weaker enemies with your stronger abilities and weapons and such.
Other than that seems like we've got stealth and melee combat but we didn't really get to see a lot of it, and of course human enemies which I was expecting despite no proof of that. Makes sense considering the games world. Enemy designs are continuing to look incredible and fairly varied, if they can give each area its own kind of robofauna that would be awesome.
I'm also guessing those black non animalistic machines are remnants from some past war or something.
I wasn't sold on the VA but its by no means the worst I've heard, basically middle of the road and the story itself seems vague as what we're getting in the trailer is the set up of what sounds like her quest. I'm guessing early game stuff and we haven't really seen much except the hints about her background being different or special and that automated door opening for her.
Overall I'm pretty excited, looks really good.