Thats because it was an early video, they had to add the shiney stuff for the mass market just like The Sims 2. I think it looks great now, it was always meant to be a funny version of the universe rather than a realistic one. You can still make scary looking creatures and places, I just don't think we have seen much of that because people always want to make crazy looking things when they test it.
Taking away the tools and demanding that the game stand on it's own doesn't make any sense- it's like saying 'let's see what happens when we take all the weapons out of Doom'. No fun.


