I don't think Prometheus has any problems with editing, in fact the editing was good (IMO). Any problems Prometheus had were script derived. If Alien:Covenant is edited like Prometheus, I won't have an issue with it, but by the sound of things, the issue people have is the pace in which it develops... it sounds like we get impregnations, gestations and full sized monsters in very quick succession ala AVP. I'm not a fan of that particularly, but as long as is doesn't detract too much from the narrative...