Recent changes and/or updates related with content.
Grubba added. He is a new arena boss and is located at Dire Maul arena.
The Zandalari Shirts & Tabards can be upgraded now. They will require mats that drop from Grubba and Zul'Jin.
Also, the mat items that drop from Grubba and Zul'Jin will be lootable by everyone. So no need to be afraid of only one player getting it. ;)