Overwatch is definitely not balanced.
Hearthstone is DEFINITELY not balanced.
I’ll only give you Starcraft because you are balancing THREE things. Retail is IMPOSSIBLE to balance because every year they add a new class, new talents or some major number crunch to the game that would make it impossible to keep up with.
Blizzard’s original intention for vanilla is correct. There is balance, maybe not the balance that you WANT it to be, but it is balance through cooperation.
It respects DND rules and the holy trinity, mages / rogues are glass cannons. Warriors are hardy and hit hard, but can’t heal. Paladins are hardy and can heal, but can’t do much damage. Hunters have ranged and a pet, but are squishy if caught. Druids have mobility, healing, and stealth and are vulnerable in human / cat form (DPS form) just like mages and rogues, but hardy in bear form. Priests are cloth and should be protected, but have ways to stay alive, healing, fear, and shields. Etc. Etc. so on and so forth. There is no balancing that needs to be done in classic, and there are no changes that need to be done to classic.
Full stop. If you want constant updates then play retail, everything you want is already there. Allowing one change (which honestly this patch already dumbed down vanilla from what it was originally) is a slipper slope that led us to BFA.