Let's be honest here. WoW PvP is World of Stuncraft.
Blizz has gotten very lazy with PvP and has decided on the easiest possible solution to handle balance...stuns and interrupts. It is also what has made the PvP game extremely boring.
Even when I'm playing on one of my melee toons, I find the PvP game simply annoying, and not fun at all. On my rogue, the game doesn't really reward being a good stealth character coming in at the right time nearly as much as performing stuns and interrupts at the right time...which is no different than being on, e.g., a Ret Pally.
TBH, don't expect Blizz to actually address this issue as it would require them to put significant effort into balancing damage and healing and removing all the stuns and interrupts they've put into nearly all the classes now (which means people would scream bloody murder if they were removed). That isn't something that happens with a cash cow.
If you want good PvP, go play one of the MOBAs or even one of the FPS games. Blizz just doesn't care enough about WoW PvP to address the fundamental issues they've created.