I enjoyed the film as I said on the other thread but there's loads that could have improved it, if only minor adjustments.
I do think the Milburn/Fifield scene could've been done differently. Someone pointed out why they were going the opposite direction to the life form reading yet when come face to face with the snake Milburn thinks it's cute and wants to pet it (inevitably leading to it violently killing him). It would've been much better had they both absolutely shited themselves all over their suites and we could have had a proper horror scene akin to Alien while the snakes stalk and kill them both (obviously this would have had to be dealt with in the later scene when the rest of the crew go back to the room). This could then have allowed Holloway to be the one transformed into a super strength monster, rather than Fifield, which would have got rid of the question why the black goo affects humans differently.