This patch added many new things but most of them are related to Witch so they will be announced later.
General
— Hell Horse added. It requires 2000 rating in any PvP mode.
Bugs
— Root effects now shouldn’t cancel casts when they end (in most cases).
— Hidden cursor no longer activates chat or other frames.
— Judicator’s Piercing Light is now more accurate.
Arena
— Shadow Orbs now ignore bots until the last orb has spawned.
— If a bot can’t reach his target for 30 seconds, he enrages, moving 100% faster and dealing 100% more damage. This effect fades once he takes 1000 damage or gets cc’ed.
— The amount of rating you receive (or lose) now also depends on the enemy’s rating.
— All current ratings were reduced by 20%.
Warrior
— Deflection now correctly negates melee attacks from the front, reflecting 50% of the damage to attackers.