Finally got to see this. Was greatly disappointed, while I agree with many on here that Prometheus wasn't great I did like the idea of the Engineers and the fact they wanted to eradicate us. So, for me, Prometheus was good in opening up a whole new area of story about existence and origins, I liked it for what it promised next, but Alien Covenant did not live up to that promise.
Covenant seemed just to re-hash old ideas as if someone had told Ripley, 'dude, people don't want deep, they want action, give them aliens exploding out of people, face-huggers, a weak captain and a strong female second in command'.
There were so many re-hashes it was embarrassing, the android was bad again, a chase through the spaceship while doors are closed behind, a fight on a platform with an alien v strong female character, face-huggers, eggs, and aliens exploding out of people. There was nothing of the Engineers and a deeper realisation of why they hated mankind so much, the flashback made them seem inferior when they were obviously our creators from Prometheus, that seemed really disjointed. Disappointed - reminded me of how 'The Force Awakens' was just a re-hash of what worked best for Star Wars. It didn't take on any of the answers left behind by Prometheus but reverted to the Alien slasher status-quo.