Human rogues can always open on horde ones (and druids). Also don’t have to deal with paladins.
Also WotF is overrated. I mean it’s good sure, vs 2 classes but there are items that do the same thing better. As a horde warlock, you’re still facing fear ward, shadow reflector, warriors, blacksmithing trinket… forget what it was called, PvP trinket and possibly other things.