Taking a different tack, that's also why I detest the extended cut of Alien Fox forced out. They put some nice stuff back in here and there - the beacon scene, even though they f**ked up the sound, or the fight with Ripley and Lambert - but the film was perfect as was. You didn't need any of that. And reinserting the fabled Dallas cocoon scene - a decent scene by itself, but clunky, awkward and shoehorned into the terrifying escape sequence at the end of the film, breaking its rhythm as well as taking away the eerie mystery of Dallas's disappearance, hence why it was dropped to begin with - was unforgivable. Worse still was the way they did it; trimming it down so it is very janky and jagged and vastly inferior to the original scene, and adding pointless music.
And the horrible Exorcist re-release - don't get me started. Everyone loves that old original ending with George C. Scott and the priest, but it wasn't truly necessary, and the way they did it and all the other stuff they put back in and "added" - oh my God.