Come on guys you can't honestly have wanted Spaihts draft more? True it would have been a coherent movie but at the same time if would have made for an awful alien movie. I think if that movie was made it would have done serious damage to the franchise compared to Prometheus. People would have said the Alien is dead... from just how many "super" aliens were killed in the most mundane ways.
Also, Prometheus is fine the way it is. Scott and Co are just dropping the charred and admitting that this is an Alien series with the name change. I can already see him saying, you know, what ever happened to that thing that was born out of the engineer from the end of Prometheus. Why hasn't no one told his
The movie was too big for two hours and got the f**k out of control. However it set up the game pieces just fine. The engineers, the science, the death and tragedy.
The way I see it, the alien is Prometheus. It hands over an egg to the engineers as depicted in the mural. They're first true piece of ultra advance modern biotechnology, that they then went all Weyland-Yutani over and created bioweapons galore. The engineers are basically the corporations scientist, bioweapons division.