I just saw it last night and I enjoyed it somewhat, but it had a lot of lost potential. I apologize if any of this is redundant.
1) How could the biologist and geologist get lost? Wasn't their signal being transmitted back to the ship? The storm wasn't causing any interference with the map, in fact we see that during the storm the map is perfectly transmitting their signals and the captain tells them to hold on for the night..
2) With that said, I liked those 2 guys, they set it up as if their was going to be some tension between the two but it turns out they got along. What I liked was that they acted exactly how anybody would act in that situation, they were scared and wanted to get the hell out of there. THEN they see an alien tentacle pop out of the goop and decide to examine it? Why? why would you even bother? You just ran away in the opposite direction when the captain told you they were reading a life signal....
3) What was David's motivation for spiking the drink with the alien dna? I assumed he was programed to do so but why? Essentially he is the reason Aliens exist.
4) Why did the engineer go berserk on them. That was sad, I too would have liked answers....
5) The big monsters at the end trapped in the room was very cheesy. I thought it was waaay over the top and unnecessary. I would have liked if it was a face hugger instead
IT was obvious with the religious undertones the movie was trying to convey along with themes of immortality and how man should not possess the answers to such questions.