The daily quests for AVA are going to receive a huge XP boost in Update 6. It is mentioned in a question about XP for the Champion System found at the 1:56:25 mark in the latest ESO Live show. The actual amount was not quantified; but "huge" is the term Maria Aliprando used to describe the XP changes coming for the AVA quests. Dungeon XP is also being increased.

http://www.twitch.tv/zenimaxonlinestudios/v/3621763