...perfect balance is obtainable without complete homogenization i.e. the class system of swtor, mmorpgs and moba are the same that they are fun because of they are in a constant ebb and flow of rebalancing . take the good times when they are good , post memes about how bad your class is when the times are dark, and i play shaman on retail atm so i know about dark times!!!
I played WC3 as well, it was a lot of fun, albeit at that time I wasn't very good.
But are there any current MMOs out there that are perfectly balanced? Even close to it? Nope, even Darkfall which was hailed as requiring the largest amount of skill (which it likely was correct about) wasn't perfectly balanced at all...
The reality is, if your standard is balance, or fairness, skill, or anything similar, then there is no such thing as "real" pvp.
Pretty sure you mean "unobtainable".