I'm always baffled at how people ALWAYS compare anything somebody wants as a "WoW feature". You do realize what a huge market competitive arena PvP and rated Battlegrounds opens up, right? Probably not.
Also, you do realize that WoW was not the first, nor the last, MMO to have this type of competitive PvP. Have you ever heard of Aion, Tera, GW2?
Ignorance judging a basic concept, is still ignorance. And my opinion when you're as ignorant as you are trying to make a point contradicting yourself you look like a fool.
Just because Blizzard didn't know how to do it correctly, doesn't mean Bioware will. And to be honest, giving everybody a knockback, stun, silence, spring, etc. Do you really want to judge Blizzard and how there lack of balance is an issue?