An important thing to note, For both Briselody’s argument, and mine:
This player base absolutely has a Silent majority. Most Vocal opinions on the forums do not represent the larger whole.
HOWEVER: That silent majority, overall. Could not possibly care less about the faction divide.
Most people in WoW really just want to play the game with their friends, and that majority of players really wouldn’t care if they could suddenly team up with all the races.
There isn’t going to be a mass exodus of players due to the end of the faction divide. Most people genuinely wouldn’t care, and many would still retain their pride for their faction, without being overdramatic just because they get the occasional human in their dungeon group.