It's allways a problem with reviewing a DLC from a game, since the game is usually the limiting factor.
If a DLC is based on a game wich already has bad movement controll or crashes often then how can the DLC be better then the foundation it is build on.
Or as it is in this case: How should I objectively give a score about a addon to a game wich is already pretty awesome?
So what a did is based on 2 critirias: How well does it fit into the underlying story and is it a worthy addon or just a small rehash?
I found the story was a welcome addition the the game since it expanded the map quite a bit and gave new challenges to overcome.
From my perspective it sadly is quite a bit of copy and paste of old stuff to a new locations. Some buulding interior design and layout look familiar and new enemies are almost to simular to the ones running around in the main map.