I'll say that the ME2 DLC is gonna be pretty good.
EDIT: I'm currently reading the 2nd ME book. I have actually noticed that they seem to be focusing on a lot of elements from ME2 - the Collectors have been mentioned, some important characters are affiliated with Cerberus, and so on - and while I'm still pretty early on in the book, I think that it'll serve as a pretty good "prequel" so to speak for ME2.
I agree that the first one was a little underwhelming, but the second is pretty good so far.