The gameplay just isn't there. It looks good on the surface, but remember, this is a vid doc we're watching.
If you break it down you realize that the gameplay is so simple, that they're trying to sell us this idea that there's value in replaying a scene only because you want to execute every enemy in a smooth flow. That fact alone screams weak and simplistic gameplay to me, that screams Star Wars Kinect mindset of marketing to me.
~70% Metacritic and sales flop. Remember where you read it first.