Unfortunately, ZoS no longer commits to double drops of arena/dungeon/trial loot. That's a pity, because extra drops of those kinds are the main appeal of regional events.
That's especially true for Year One. A while back, when Perfected Maelstrom weapons were introduced,
@Alcast said he wouldn't even bother rerunning Maelstrom Arena until there was a double-drop event. (I don't know whether he stuck by that, but that's what he said to me at the time.
) I've NEVER done Dragonstar Arena in any form, but two different Master's Weapons look interesting for how I play (the resto staff always has for large groups, and the ice staff now might for wardens and/or healers). I was assuming it would be easier to find or form a group for nDSA during the event -- but if double drops don't happen, why should that assumption prove correct?
Anyhow, the "bonus rewards" section of the official announcement includes
Bonus Rewards
In addition to the Year One Coffers, during the event period, the following activities have bonus rewards:
- Double reward boxes for all Daily Quests in Wrothgar, Imperial City, and Craglorn
- Increased resource node rewards (not including those from fishing holes or crafting materials obtained from creatures)
- Bonus loot from World Bosses, Dungeon Bosses, and Delve Bosses
- Bonus loot from chests in the Maelstrom and Dragonstar Arenas
- Bonus loot from the bosses in the Craglorn Trials (in addition to earning two coffers for the Trial’s Weekly Quest)
- Bonus Tel Var stones earned in the Imperial City
https://www.elderscrollsonline.com/en-us/news/post/60751
I'm curious to see what people's actual experiences wind up being.