I couldn't care any less about Liara. The whole self contained story , well done mysterious vibe, new awesome character know as Vasir, and the outstanding soundtrack made it truly special. Instead of getting stuck in silly puzzles and time increase enemies, we get a straight forward story focused on someone the entire Mass Effect fanbase wondered about.
Um, the whole DLC is Liara-centric. Who winds up being the new Shadow Broker again? That's right, Liara. So basically, what you're saying is "Oops, I guess it was just more of the same". It had to be, it was, after all, capable of being played midgame in ME 2. That's the problem with DLC, it's always tied to the game it's in, and it's always more of the same stuff that was in that game. Always. There was no mysterious vibe, the Shadow Broker was trying to kill Liara. What's so mysterious? Vasir was so memorable that I'm about to look them up to see who they were, oh, maybe it's that other Spectre that was working for the SB, the one that wasn't very bright, trying to take a hostage when dealing with another Spectre? Evidently you're misremembering some stuff, because frankly, she was just another idiot with a boss fight...