I think everyone needs to just cool it for a while. I have my doubts about some aspects of the movie too, but it's not fair to judge the film based on a few trailers and a one-minute clip.
Welcome to the internet, brother! Measured reason and patience are the exception, not the rule.
I for one think this thing will be awesome (based on the one-minute clip). The second I saw the Space Jockey pop through that floor I knew that it's going to be amazing.
But I will reserve judgment until I see it...