I would give Alien: Covenant a 7/10, possibly down from an 8/10 only because of a few plot holes that annoyed me that I won't go into here due to spoilers.
Overall it was a smart follow up to Prometheus, answered a lot of questions and raised a fair few more, which is just what you want from an 'interquel' surely? In parts it was a bit of an Alien tribute movie but the whole tie in with David + the Engineers was great I thought. Well done Ridley, bring on #3
The whole film was about the evolution of a creature in various forms and now we know a lot more about the how/why/who etc