Official Patchnotes (en): http://us.battle.net/wow/en/blog/19806402?page=1#1
MMO Summary (en): http://www.mmo-champion.com/content/4972-Patch-6-2-Live-This-Week!
p.s.: BRF/HM Nerf Incoming!
In the wake of the string of defeats suffered by the Iron Horde, all enemies in Highmaul and Blackrock Foundry on Normal, Heroic, and Mythic difficulties are Demoralized, reducing their health and damage by 20%.