The quote from the patch notes reads as follows:

"An issue wherein players were unable to use their pet’s actions while casting a spell."

So yes, for you Scholar's out there, this means you no longer have to trigger your pet's heals/actions right before a spell. You may now do so at any time.

While I was sort of getting used to, and even enjoying the challenge of having to micro my pet in between my own casts, this is still a rather welcome fix!