Even so, the shooting part feels better; the rest of the game feels worse for me, especially after playing Shadowgrounds just before this game.
The constant we put you in a tiny room and swarm you with enemies just makes no fun.
What annoyed me too was what was rare in the predecessor: we spawn enemies behind you in rooms you just cleared.

The story was okay in addition to Shadowgrounds, but it feels worse for me in all aspects except the shooting part because you now have more ammunition for your weapons.

Short, if it was part of Shadowgrounds, it would be an okay bonus, but as a separate game with a bigger price tag, it just feels worse.
I would say just buy Shadowgrounds and forget this exists.