You can make this argument for all kinds of things: lfr, lfd, flying, every convenience imaginable. The only difference is, of course, AV was watered down and neutered by 1.12. So it’s still authentic Vanilla.
That doesn’t make it the right choice for Classic though, because…it isn’t. What Classic should strive for is offering something different from Current WoW. And 1.12 AV is the most easily zergable time in the battleground’s existence. You don’t even have to take down towers or bunkers. There’s no stacking buff, and the mobs associated with those towers aren’t aggro attached to Drek and Vann. So you can pull them, pull him, reset them and take just him.
Even TBC fixed those things with the stacking buff and linking aggro. So while it added resources it actually become MUCH harder to zerg compared to 1.12. We’re getting literally the easiest version of AV ever. It’s a damn shame. 1.5-1.7 AV would have been truly epic and offer something very few got to experience. Something radically different from what players can experience anywhere right now.