If anything all the below averagely skilled pvpers played alliance the first time around in original tbc, and now they all read online that they have to have Will to be competitive and rolled horde this time. Alliance will end up getting some of them from you with a change like this and horde will get a slightly better win rate in pug BGs. This won’t have any affect on highly skilled pvpers, it’ll just shake up the 1000~1400 bracket a whole lot.