-The movie takes a while to get rolling. In ALIEN, the movie pretty much started with the crew waking up. In this film, that happens about 15 minutes in, violating the 'arrive late, leave early' rule.
-What was the point of leaving star maps in ancient cave paintings if they lead to a defense installation where the one remaining ambassador is just going to roid out and body slam his guests?
-What was the point of Fassbender poisoning the one scientist dude? That subplot wasn't really explored at all.
-Also not sure of the purpose of having the alien baby. Rapace runs from everyone and nobody follows her. She cuts it out and is sore a bit afterward. What were the consequences of that entire sequence? Seemed pretty extraneous to me.
-Why would anyone run along the path of a giant rolling object instead of simply stepping aside? That was the dumbest thing I've seen in a movie in ages. You can't outrun a train; just step off the tracks!
-The scene where the random expendable guy voluntarily pets an alien snake...why? No tension or suspense. Just a dummy waiting to get killed. I didn't care.
-There are a few interesting ideas about life and creation and purpose being tossed around, but they are never explored in any way. Characters just ask questions and then die. Like snuffing a match before it reaches the candle.
-Despite the movie's lofty ambitions, it feels very small. Not only geographically, but in a sense that not a whole lot happened...and what did happen usually had no significant consequence, which made it feel - ironically - pointless.
It looked cool, the cast was good, and the music was effective. Otherwise, it didn't accomplish much. I know the movie wanted me to think, but not about how it could have been better.