Blizzard has nerfed the Horrific Vision in Stormwind, in addition to increasing the legendary cloak cap for World of Warcraft.
Here are the nerfs which took place during the February 14 and February 14 hotfixes:
Last Stormwind Week (February 24th Hotfixes): Magister Umbric now casts Frozen Storm twice during the encounter (was 3 times).
Last Orgrimmar Week (~ Feb 24th): An undocumented hotfix made it so that Druids can now Shapeshift Leaden Foot.
Two Stormwind Weeks ago (February 14th Hotfixes): Darkened Sky now drains 40 Sanity (was 60 Sanity).
Two Stormwind Weeks ago (February 14th Hotfixes): Alleria now casts Chains of Servitude once during the fight (was twice).
Additionally, the legendary cloak cap has been raised to rank 13. Achieving this rank will net you 5% more Sanity Resistance for a total of 70%. This is up from 65% previously. To get rank 13, you’ll need 4 Torn Pages of “The Final Truth.” You can earn one such page for every Lost Area completed. Talk to Wrathion inside the Heart Forge.