If you like hunting you'll see incredible improvements in mob ai. Being in the anti-quester league, with the newer npc interface quests have been down right enjoyable to me.... except for those long walks to BD. 
Hope to see you in game.
- Nova
Not to mention with all the work being done I currently know of no 'broken' or seriously 'bugged' quests. We're getting close to a time when there may be nothing wrong with any quest at all.