Played the PS4 version:
I really enjoyed the setting and ideas that the game explored, but the gameplay itself was a bit lacking. I couldn't really connect with the game, so I really only played it like a horror game, so it probably didn't resonate with me the way it should. I didn't really care about the little sister dilemma until very late in the game, I was more curious about the world and everything.
Possible spoilers: I got the bad ending because of this, and this ending just felt rushed, especially because I must have harvested like, what, 3 or 4 little sisters in the entire game? I saved probably other 2, and other than that I avoided the fights, again, playing like it was a survival horror. So yes, the game didn't grab me the way it should, and I just left saying "cool".