While spell batching is a plague to healers, there are a number of interactions where it is a good mechanic.
This includes the following
Reckoning /sit macro
Windfury Storage (both the stormstrike macro and the /cast /stopcast method)
Dodging CC effects such as polymorph by batching a self damage effect
There are a lot of skillful tricks you can do with spell batching especially in pvp that I think add a lot of depth to the game.
I am not advocating to put everything back on the 400ms having most things on the new 10ms is good for the game, but there are a lot of interactions that are better left on the old 400ms batch
and remember gentlemen if you’re on the PTR please assist!