More than 0.05% is different. The batching issues are affecting fundamental gameplay interactions. I referenced pet commands and feign death (this is already much, much more than 0.05% of the game for Warlocks and Hunters), but almost anything that requires you to place an input experiences a bizarre degree of lag. Buying things from vendors, for example, was never a batched experience.
Again, this affects very fundamental gameplay and it seems like Blizzard didn’t really put much of anything on the priority batches like they are supposed to be.