The whole Goblintown (or whatever) escapade was horribly off in tone. The entire segment (save for the Gollum parts, which were excellent) and especially the escape were completely played for laughs - the casual killing of goblins in amusing ways, the way the goblin leader is killed (seriously, those last words?), etc etc. I don't mind these movies being lighter in tone, but they should've stuck to serious in this case. Gah. Did anyone else get this impression/dislike the scene?
Not really a complaint per se, but I expected the movie to have more of a LOTR feel. It felt more... generic, I guess, than the trilogy. I dunno.
In my opinion the film was too much LotR. This was the reason Goblin Town didn't fit: The film up to this point had been trying too hard to be an epos... which simply isn't in the source material. The Hobbit is a children's book, an adventure's tale, funny at times and silly at others, and while it is a stone in the epic mosaic that is Tolkien's Arda, it just doesn't work as an epos out of itself.
This was the reason they put in Azog(blegh) and put the focus of the film on Gandalf and Thorin instead of Bilbo whenever possible. This is the reason characterization --a point at which the films could have proved better than the book-- was painfully neglected in favour of archetypes... which at such a small scope quickly become stereotypes.
Goblin Town, with its non-LotR aesthetics, and dialogue taken from the book, would have been great on itself. I honestly like the design of the orcs down there most of all the affiliated films, bad CGI or not. But the film had tried very hard up to this point to be a mostly serious epos, that retold the Hobbit scene for scene while trying to build a completely different atmosphere. A darker one. Sure, there were funny scenes in bag's end and with the trolls, but they almost seemed out of place. That shouldn't have happened.
Also the goblin leader was great. Should have replaced Azog. Damn, Peter Jackson in a speedo could have replaced Azog, and it would have improved the film.