Update 4 launched today, patch notes here : http://forums.elderscrollsonline.com/discussion/131752/patch-notes-v1-4-3#latest
Notable changes include:
The max Veteran Rank was changed from 12 to 14
The upper area of Craglorn has been released, this includes :
Dragonstar Arena - A group of 4 players fight 10 waves of enemies in an arena.
New Trial - The Serpent Trial
New Armor Trait “Nirnhoned” - This increases spell resistance from 2.5% - 4.5%
Unlisted Change :
Werewolf Transformation now costs ~450 ultimate, whereas before it cost ~750
Check the notes for plenty more changes.