It's not just aliens we wanted. We wanted beautiful Ridley Scott cinematography (check), a good score (check), good writing (yikes), good acting (check) smart characters (double yikes), no main characters dying off before the opening credits (triple yikes) and probably some mystery to the creature (was mostly intact in Prometheus, not Covenant). Undercooked stories and dumb characters weigh the two movies down in the worst way. David is legitimately great IMO, I must admit. If he sucked, I wouldn't be torn.