If you're going to go to the trouble of expanding the almost non-existent Orcish vocabulary that Tolkien left (and grammar, no doubt), you could at least use it for something less vapid than empty not remotely scary threats and whining about inadequate underlings.

As it is, I'm going to have to say it would've been a better movie without him, and without the Orcs talking in Orcish. The Goblin King was much better.