Warlords of Draenor hotfixes have been published the 10/01/2015 ! Here is the patch notes :
Patch 6.2.2a Hotfixes: October 01 (Source)
Raids and Dungeons
- Fel Lord Zakuun
- [Requires a realm restart] Cloven Soul should now always be applied to the target with the highest threat that is currently tanking Fel Lord Zakuun.
- Mark of the Ashtongue is now usable while in combat and the cosmetic transformation no longer breaks in combat.
- Fixed an issue that could cause naval equipment to incorrectly display as red on the naval equipment vendor, (but is still purchasable) when the item in question has been unlocked for the character.