Well, these prequels aren't really interesting to me. They feel very contemporary scifi. I cant say theyre bad or that I dislike them, they just dont grab me above a single viewing. Having seen them both since Covenant hit theaters. Of course, like to most others, the idea of David creating the alien and Space Jockeys being what they are as oppose to being some gruesome fusion of tech and body repulsed me and ruined the whole terror/unknown aspect of the first film. But thats all behind us. But I never ever liked the David character, always reminded me some Monty Python character in Prometheus, I dont know why, maybe it was his bad C3PO expression. I was annoyed by the character so you can guess my reaction to Covenant being all him and putting him in the center of the alien mythology.
Everybody likes what they like, for me THE meat of alien mythos is the story of Ripley, beginning with Ridley Scotts terrific very good looking film ending with Ripleys death in Fincher's nihlistic and also very well shot Alien 3. But despite prequel's whacky ideas that I so dislike, they dont offend me as much as Resurrection
Many seem to attribute the alien mythos to Scott, neglecting credit to Dan Obannon and Giger, who were equally as crucial to the first film and the creation of this thing as Scott was. Scott isnt the father of Alien, he is one of the fathers.