Hum...nope....IMHO it messes up guilds, raids, pvp...everything
Unless ofc they go one way for the sheer lore and ignore that in gameplay - as they do now with 8.2.5: War is over, Sylvanas buggered off, Horde and Allinace leaders are all happy cuddling.....yet we still assault each other every 12 hrs, kill each other in pvp objectives and so on.
Also: You talk about three factions...others here have signatures to abolish factions because they are "cancer"...so why not leave it as it is and piss off the least amount of ppl
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Oh...hey....why did I know this one would pop up. IMHO Starcraft disagrees...but whatever....