I'm watching the destructoid walkthrough video of the DLC and I'm bored to death... I think they released it too quickly.
I have over 120h played in the game since release and right when I had enough and planning on taking a break to play other games like Dishonered and XCom they go and release the DLC... Sorry but I'm burned out. I'm sure I'll play it at some point in the future but right now I just lost all interest. The marketing strategy is just way too agressive.
Are you seriously blaming them? You've played the shit out of the game and burned yourself out. It'll still be there for you later if you decide to come back. For the rest of us who have been enjoying the game in moderation, this is a perfectly timed DLC and I prefer it to having it come out in 3 months when I've moved onto something else.