Finished it up this evening.
It's a very good game. I probably wouldn't place it quite as high as the review scores are placing it but its a darn good story-based fps campaign when there are few good story-based fps campaigns around so I think that is why its being over-rated a degree. Reviewers are trying to make a statement imo about what they want.
As most people have mentioned its very similar to the original Bioshock. Like I mentioned earlier I think the combat is better because it provides you with more options and more variety and the sky-lines while admittedly a bit of a gimmick undeniably make the combat feel more dynamic than is the norm for fps combat. The story is better and worse in some areas than the original. It has high highs and stumbles at time. (The race stuff is handled very poorly imo. Doesn't feel real. And they don't have anything really interesting to say or to add to the topic which is a shame. That was a missed opportunity so instead all it really serves as is backdrop.
spoiler (click to show/hide)
And at a certain point its dropped completely which is like an admission of either not caring or not knowing what to do with it.
As far as the ending,
spoiler (click to show/hide)
(I liked it. I liked that it tied in the bioshock infinite concept. I like that it was artsy. I like that the ending is a downer. I like that they didn't pussy out on that aspect when most videogames and most devs absolutely would have. I thought they played it way too safe and boring in the original so I'm glad they didn't this time. I fully admit I didn't quite understand some things when it was over so that GAF spoiler thread was actually quite useful
The game does drag over the last 1/3. Basically they had run out of new content and new enemies to introduce so if there are any valid arguments about the too much shooting complaint that's where it would be. The problem isn't the shooting purely imo though. Like I said its just that they've exhausted all the mechanics and combat situations they can throw you in at that point. And since you're only more powered up, the only solution is to throw waves and waves and waves of enemies at you along with putting you in more annoying combat situations.
spoiler (click to show/hide)
(I didn't like fighting the mother stuff. The concept was fine. The execution was poor. Same with that final fight where you can control the bird. Suddenly they are tossing in a defend the generator mission type.

Overall though very good game. It reminds me a lot of inception. A piece of work that feels cooler and more substantial than it actually is. Ignore the reviews when it comes to the psychology of the game. It really has nothing interesting to say about race, love, society, or anything of that ilk imo. What it does is craft a very good world that feels immersive to be in and story where you geniunely care to see the next beat in the story because you kinda feel like anything can happen which is a nice thing. It's a well crafted experience.