When watching the movie the second time, I wonder why they didn't all just fight Azog and his followers? At some point you would think getting chased would be tiresome, and you would set up an ambush.

1. Two wargs attack the Company in the woods. They are both killed immediately. The dwarves are competent at killing.
2. The orcs are not expert fighters. Even Bilbo kills one, and he has no fighting experience whatsoever.
3. Some have long range weapons, and Kili is shown to be a good archer.
4. When the majority of them get out of the tree to rush to Thorin's defense, none of them are hurt by orcs.
5. They have a wizard with them who is powerful enough to kill a Balrog.
6. The Elves hate orcs and killed some for you. Surely they would help you kill the rest with an ambush.

When you force characters into the story, as well as making the dwarves more competent than shown in the book, you create more holes in the logic. This didn't add tension, just confusion.