Some of the replies make me wonder if I put myself across properly. Personally I don't have any problem with a "Marvel-esque" EU because as far as I'm concerned, that is how the Alien films and Alien comics started. They all had connected narratives and elements running through them from the very start. I don't think the Fire and Stone or Life and Death series have had the various other series shoehorned in, I think they just did the wrong story (at least in F&S, can't judge L&D yet) and weren't able to really do anything with where it went.
My issues are with the retcons and shoehorning elements into that. There was no need for Ripley in Out of the Shadow, there was no need for Colonial Marines in River of Pain and while I can't really judge the Predator prequel thing, I really don't see any need for that proposed story.