To help clear up any misunderstandings here is a list of all the undocumented changes that have gone through with Patch 2.4.2
Hunter

Scare beast isn’t instant and still have its 1.5sec cast time, even if the tooltip still says “Instant” this is an intended change and the tooltip will be reverted back to 1.5 sec [...]

As usual after each patch, here is the list of 2.4.1 changes not documented in the patch notes, most of this information was snagged off the elitist jerks forums and it was parsed by Teza from World of Raids.
Dungeons and Raids
Magister’s Terrace
• All NPCs in normal and heroic give reputation at their previous levels so it’s [...]

Stoic from Kalecgos server asked this on the general forums today, and with good reason as the actual patch note can be confusing.
PTRs have been updated with a new build (23.2 mb).
Some changes on PTR:
- You can now inspect members of the opposite faction.
- No matter where you are you can now choose if you [...]

Here they are!

Howdy folks! I’ve almost beaten this cold so expect a lot more activity today than previously this week. Here are the new changes to the patch notes for the PTR and Patch 2.4.
The fact that Ghostwolf is now instant cast (with talents) is nice for us shamans, but I’m really excited about the ability to [...]

I went ahead and gathered up as much information as I could pertaining to the 2.4 patch as there will be a lot going on in the next few weeks.
PVP Changes
Class Changes
Raid Changes

Sunwell Isle - A new area located north of Silvermoon City-Sunwell Plateau is a high-level 25 player instance featuring six bosses-Magister’s Terrace [...]