Drain, what the hell is with this childish behavior.
25% Stun Resistance > Will of the Forsaken because you already have a PvP trinket and a Felhunter self-devour to remove fears. Strictly speaking, any matchup that Fears (Priests, Alliance Warlocks) is a matchup you didn't need WotF to win. Any matchup that stuns is a matchup where Hardiness becomes a game-changer. That's not to say that WotF is a bad racial by any means, but that Hardiness simply tops out in improving your matchups. For World PvP in particular, I'd rather have the racial that ruins stunlocks than the racial that breaks fears. A single Living Action Potion is a must-have against Rogues but the Rogue has a ton of stuns so every extra stun that gets resisted makes a huge difference.
I have a more detailed analysis of racials here.
