I enjoyed wow pvp on archimonde. That server was almost magical in that there was a huge player-coordinated effort to have a relatively balanced faction fight AND there was a delay in its launch due to popularity so all the limp dicks with no patience went elsewhere.
I've never played on nor even seen a wow server that came close. Every one, and I mean fucking tons with several friends playing on literal dozens, they ALL become imbalanced cesspits quite quickly.
Unless I see some evidence of a serious player driven effort to forcibly create a balanced pvp server, or some kind of miracle out of blizzard, I expect NO pvp server to stay good long term. Every one will end up a lopsided shitshow; the only way I expect a server to be relatively balanced is if its fucking dead.