I get your point but I have to agree with ubergoat: I can't tell if your 2.5 rating is about this specific DLC or your disappointment with the direction Mass Effect 2 went as a whole. I'm not even sure if you don't give the 2.5 to yourself for still buying ME2 dlc after being repeatedly disappointed by previous dlc's
As a sidenote:
I've never liked the Mass Effect 2 format of Shepard gaining sidequests via email, but I can forgive that.
I get all the 'sidequests' in my dayjob via email, things that are not of vital importance don't justify a meeting in person most of the times. I don't see any problem with that.