[dancing spawn of ungoliant]

Now that was the only good part (IMO) of Gothmog's inclusion.

I agree!
I saw the film yesterday again and I noticed that Gothmog actually had 2 eyes. I had thought that the hideous hole in his ugly face was an empty eye socket but there was a tiny eye in the hole!! (if there was a "throw up -smiley", I would insert it here)