For anyone under 2k rating racials doesn't make or break anything its people not understanding how to play their comp(or its a terrible comp and can't compete *cough* holy priest *cough* lol). But Once you start making your way up, it makes a HUGE difference for healers specifically. Having extra racials on your team to counter and survive is super Important. Living is more important than doing damage most of the time, since you can't deal damage when you are dead.
Is it Killing PvP not being balanced? .. no
Does it help balance? .. no
But who is blizz going to make the game more enjoyable for? The 5% who make it past 2k rating or the 95% in the 1550 bracket? One would hope the latter since that makes the game better for everyone..