There was not a change to the way Growl scales with hunter AP, the bug fix eliminated growl scaling with the pet's attack power. Growl has always scaled with hunter attack power in exactly the same way as it does in 2.4.2, there were no changes. I have verified multiple times that growl threat does scale with hunter AP AND that it is doing so in the same way in 2.4.1 and 2.4.2. I'm sorry if you were given the impression that this was a new feature.

We would like to request some focused testing on a bug that we believe to be fixed in 2.4.2. Using a macro with several instant cast spells can break targeting and the Escape key. This is most often reported as happening with hunter kill command macros. Please test your macros and report here if you encounter any of these UI lock-ups.

Turns out this is an intended change that didn't make it into the patch notes.

It's been how long since the initial announcement of the new expansion? Just wondering when Blizzard plans to reveal any details of substance to us after all this time. Infrequent screenshots and mob updates can only sustain you for so long.

Updates of a more significant means are in the works. We just ask for a bit more patience even if I can't give you a more definitive time to watch for it by.