Blizzard has explained their position on this time and time again, such as when they fixed dumb jumps in AV in classic. I’ll link it for ya, to make it easy.
https://us.forums.blizzard.com/en/wow/t/world-of-warcraft-classic-patch-notes-version-1135/576276
Look at all the jumps fixed:
Terrain exploits
- You can no longer climb the waterfall and enter the Frostwolf base near the Relief Hut.
- You can no longer climb the cliff and enter Dun Baldar near the Aid Station.
- You can no longer bypass Icewing Bunker.
But wait, muh changes, right? They explain themselves:
These were issues that were clearly unintended by the design of the time, and are now fixed
and
- Developers’ notes: As always, our intention is to accurately represent the 1.12 design intent of the game, and these bugs are clear examples of behaviors that were never intended.
Spell batching (in vanilla) was an intentional and specifically coded mechanic to cope with server/network limitations of the era. Therefore, recreating that intentional mechanic for classic makes sense. Leaving in unaddressed terrain exploits is not the same thing, which Blizzard themselves even explains.
Spell batching is love. Spell batching is life. Cheap terrain exploits are dumb.