I disagree with people who say W/S is good in pvp. They do get an admirable ranged stun, and several ranged shots. However, the rage generation chances are low to decent at best, and the focus costs add up. Your good for a few seconds of damage, but past that you have to rely on your own rage generating ability.
If you take W/Wd, they dont have any such problem. Savage Whirlwind+spamming PotWS does fast damage and it can be continued as you build rage, until you do your hard hitting combos, while you also get stat boosts from surprise attack and savage whirlwind.
Bottom line, i dont like w/s that much because they get a few convenient ranged hits in, but if they dont win in the first few seconds they run into trouble, while other warrior combos like W/Wd dont have that issue.