Was part of the problem due to the editing? Was enough captured on film whereas a better editing job could have resulted in a finer film? If 30 minutes were cut, I really wonder how much of that would have contributed to a welcomed improvement.
Heck, they could've turned it into a different movie with a 15-second subtitle. When the revived Ancient grabs the android, just add some text so he says "This planet is level 14 quarantined! None of you may leave or you'll spread the infection to other worlds!" Then the android says, "But we must return." and the alien says "So be it. I must kill you to save your species."
Boom. Whole new movie.
The Proto-Indo-European that was intended to be spoken by David:
"This man is here because he does not want to die. He believes you can give him more life."
However, some of the David's exchange with the Engineer was cut
so I'm not sure what actually made it into the film. As it is, unless you happen to understand the lingo, David might as well have said "See your bike, it's a girl's bike."