Ah didnt know that, explains a fair bit. Personally I like a bit of mystery and "what da fook was that about" when I come out of a film. The good thing with Prometheus is that after a few debates things made more sense where as with Lost and, for example, Kill List, its pointless to analyse it. Maybe its just my limited in-film IQ.
I can see why some purists dont like it at all, I have an Aliens obsessed friend who didnt dig it. Interestingly he is raving about the new Judge Dredd film...
Perhaps the sequel will point things in a further direction which pleases more people...