It even depresses Joss Whedon that he had a hand in writing it, from what I've heard. I don't know any of the specifics, but apparently he's disavowed association with it because the way it was filmed bears no resemblance to what he imagined while writing it. Still, it sounds like it's far from being his best work, to put it mildly. (His best work being Firefly, to me.)
About a year ago I tried making a new sound mix for Alien that re-incorporated Jerry Goldsmith's music, trimmed as needed to fit changes in the edit after the scoring. In some places it sounded great, but in some scenes I just could not get it to work, because the wrong music couldn't be eliminated from the rest of the mix without severely compromising the overall sound. It would have been a pretty rough mix anyway, more for the interest factor than claiming to be a viable alternative track, but eventually I just deleted it in frustration. Still, I might try again some time, if I can muster the patience and motivation.