It's not about faction removal, if I could I would have written Factions stays like they are, no changes to gameplay, no Cross Faction play in the title I would, but who wants a long title. The thread is much more about cross faction play, mercenary modes etc than removing factions. Horde and Alliance would still stay. You could for example kill the opposite faction in every place you would do no, just not in dungeons and raids. And then you don't kill other players anyway.