Played through the entire story, was awesome. The new bossfights are cool but could be more challenging because with the laser you one shot the sewer boss. "Sahelanthropus" was a nice addition, didn't expect to fight that, but it should have a nuke as a special attack.
I feel like the weapons need better balance in general. The Gatling gun does almost no damage while the laser melts 3 enemies in one shot.
I absolutely hate the quick turn function, I'm strafing all the time and sometimes if you hit shift + S in the wrong order you do a turn and walk into an enemy instead of strafing away. The additional control in the boost mode is a great addition but could use some more work, controlling the vertical rate only with your mouse is not that intuitive.
All in all great progress with the boss fights, very solid.