Please read those words. Then read them again. Did you do it? One more time please.
Did you ream them carefully? Notice what I didn't say. I didn't say "Classic WoW PVP is the great PVP of any game ever!" That would untrue, right? Of course. What did I write instead? I wrote that the PVP for Vanilla WoW happens to be fun. Which it is. Do you know what other games have fun PVP? None released this decade, that's for sure.
You see, back in Ye Olden Days, PVP was """imbalanced""". Or, to be more specific, it what is called imbalanced on WoW forums by whiny lazy Gen X housewifes with spending power. In Ye Olden Days (2004-2006) you could one shot people by burning your burst CDs. This made tons of lazy, whiny Gen Xers upset. Because they have a baby in the other room and there's no way they're going to waste their precious time parenting their child. Their stupid fucking half-assed attempt at playing WoW is far more important. So they ran to internet forums and complained. So then the PVP became a hyper-managed, zero-fun-allowed system where no "imbalance" is allowed to happen. But it turns out when you make literally every class in a game functionally 99% the same, the PVP stops being fun.
Sometimes it's fun to gank and it's fun to be chased down by a ganker. And it's fun when your class is completely different than someone else's class and you two can complement each other and work towards a common goal. No modern MMOs have this anymore. It's a little, tiny, forgotten thing called good game design.