I believe the only reason are racial traits ... while elves have +2 to Dexterity, Drows have +2 to Charisma instead ...
So they simply cant be in same group providing different bonuses.
With half/elves there is no problem, since all half elves have simmilar racial trait (that is +1 to two stats if i recal it corectly) and everything other is just matter of sub-races.
I still dont understand why cant we change Race for our hirelings.
Lets us play Githyanki as racist as they trully are!
