It's time. Reduce the batching window

[Delimicus-heartseeker]

Blizzard did because the “authenticity before fun”, aka “No-changers” campaigned for Spell Batching here:

PvP needs spell batching or the meta is tarnished

If you don’t know what spell batching is, it’s the way the game processed spells before WoD. Spells were processed every server tick instead of ASAP and it’s what let two Mages polymorph each other, two Rogues gouge each other, two Priests fear each other, and so on. While it’s true that it was originally design because of technical limitations, it was kept all the way until WoD because of the positive effect it had on game play, most notably PvP. In PvP it gave you options that are not availa…

and here you can see them excited about Blizzard’s decision to revert to the stone ages:

Spell Batching in Classic

Since we first announced World of Warcraft Classic, we’ve seen questions about spell batching. While we never really eliminated spell batching in WoW, we did change how (and how often) we process batches of actions coming from players, so you’re less likely to notice that processing in today’s game. We’ve been working to ensure that in WoW Classic, the gameplay of activating spells and effects will not differ from the experience of playing original WoW. It was relatively common in the original…

Plenty of people there who now regret their support of Vanilla Spell Batching.