I am relatively new on pvp but it is extremely cool. All talents are super funny. Although, I have problems with two very specific classes 1:1
Unholy DK
Destro warlock
They are just too strong for a noob like me. I do not know what to do to beat them. Only times I crush locks are when they do not pick Succubus (the right demon).
In WPvP - always keep 1-2 mobs on you when fighting a Warlock - they are your best friend(s) to help you get out of CC faster. The sooner you get out of CC the sooner you can out-range that inevitable Chaos Bolt cast, or use def. Works for every class vs Warlock+Succubus or any Blind/Poly/Fear/Sap/etc…
Those little backstabbing guys at the dark corner have shared their daggers with warlocks backs since vanilla. With ruthless efficiency.
So the answer is rogue. And oh dear how easy it is if you have played both, when I’m on my rogue the warlock is dead, no matter what he tries to do, only friends can save him.