Actually i dont really like this idea ( i kno its to late to undo it now)
But in my opinion, changing the RACE of every player every month takes away the RPG feeling, you choose a race and you are part of it.
It makes you feel like part of a big family, but now that you are getting changed, it feels more like you are playing an action game with different game modes; and i dont think thats the point of an MMORPG.