[Aaron]

In many ways, I feel my issue with the movie - and the prequels in general - comes from how Jackson regressed the Orcs and Goblins.
Tolkien was no fool. He knew that he needed a competent adversary to build the drama - and so the Goblins and Orcs within The Hobbit always seemed very competent to me, indicative of a wider civilization, capable of negotation and reason, which made them all the more dangerous to our heroes.

I do not see the Orcs in Tolkien's story as being evil for the sake of evil. Bolg is attempting to avenge his father, and I think that's a wonderful motivation. We could have had more of him growing as a commander, seeing his genuine hurt and why it was so important to get his revenge.

It would have hammered home the dual nature of Thorin, too. As both hero and plunderer. And been more faithful to the book, which almost seems to me to be reminiscent of morality plays - with a heroic King eventually being undone at the height of his triumph by his own hubris, whereas the humble Hobbit is graced with the right to go back home and enjoy the fruits of peace.

There was simply so much more they could have done, but I fear that Jackson, whilst viewing his insertions as "padding out a children's story", actually underestimated the hidden depths of Tolkien's story.

I take solace in the fact that one day it will probably be made again, and hope they have better luck the next time around!