Taz, when I saw that on my twitter feed I just took it as my early Christmas present.
It still remains prettiest movie I saw of 2012 in terms of design (and one of the few 3D movies that actually felt right to have the glasses on) but io9.com did a read through of the original draft that made me think of what could have been. It was not perfect by any means, but I think the film would have been helped. Namely, NO PETER WEYLAND SECRETLY ON THE SHIP AND NO SECRET FAMILIAL RELATIONS.
http://io9.com/5960275/what-did-damon-lindelof-add-to-prometheus-the-biggest-differences-with-the-original-draft I also think if there is a sequel, I secretly would not mind if David and Shaw just become 'Itchy and Scratchy In Space' frenemies.