opinion, i dont think that there should be a game changer to ask if you will kill moira or not. but im not the type to abandon friends ( with benefits ) as well so obviously i wont kill her. i did choose to kill her to see what happens for fun and i was surprised how fucked up it was but its understandable that the jess that loved you for so long stays by your side while the others cant even look at you anymore. the worse part is that your character says, "i made the right choice". then i loaded my save and chose not to kill my friends like i wanted to do anyways :)