Big buffs for DH's Sentry on the PTR

Witch Doctor's Haunt and Wizard's Disintegrate also get a DPS increase while the auction house gets a small UI improvement.

Miscellaneous

An option to display Auction House events (sales, expirations, etc) has been added to the Social menu.
Treasure Goblins will now play a sound whenever they become aware of a player

User Interface

You can now change the icon for each tab in the shared stash
The intent of this feature is to allow players the option to visually customize their stash tabs to better reflect its contents

Items

Affixes on items will now roll their level based on the level of the monster killed (rather than the item’s level)
This now applies to random affixes on Legendary items

Demon Hunter

Sentry
Increased from weapon damage from 55% to 88%175%
Skill Rune – Spitfire Turret
Weapon damage increased from 8% to 15% 30%
Skill Rune – Chain of Torment
Weapon damage increased from 80% to 100% 125%

Witch Doctor

Firebats
Reduced Mana cost by 20% (from 122 to 98 per period at level 60)

Haunt
Weapon damage increased from 575% over 12 seconds to 575% over 6 seconds
Skill Rune – Resentful Spirit
Weapon damage increased from 287% to 383% over 2 seconds

Wizard

Disintegrate
Arcane Power cost reduced from 20 to 18 per period
Weapon damage increased from 155% to 170%
Skill Rune – Chaos Nexus
Weapon damage increased from 40% to 44%
Skill Rune – Entropy
Weapon damage increased from 178% to 196%
Skill Rune – Intesify
Weapon damage increased from 202% to 221%

Source: Battle.net