I didn't have a problem with the DLC or the game. I certainly wasn't expecting another cosmetic suit that doesn't affect the gameplay whatsoever. My N7 armor looks fine to me. I will admit finding a new weapon would be nice, but frankly I'm perfectly happy with the weapons I have.
I will admit the DLC was short and it did reuse some areas, but at least it wasn't $15 like the Mass Effect DLC. You could have waited for the reviews to come out, learned it was short and not bought it at all if it bothered you. Lesson learned I guess.