After playing through the 'Battle of Endor' DLC, I think I see why it was only a dollar. It's plagued by the same problems as the main campaign - the most glaring of which is that there isn't any variety in the gameplay. You can burn through the entire thing in about 20 minutes, and most of that time will be spent hacking away at boring generic enemies.
I love the story in TFU to death (it has so much potential), but they NEED to spice the levels up some for the inevitable sequel. It's like they made this in a week or something.