i've noticed that there are almost always 3 tradeskill drops from Vulak`Aerr in the group mission but they are never lootable.
https://forums.daybreakgames.com/eq/index.php?threads/vulak-mission-loot-off-dragons.272333/ https://forums.daybreakgames.com/eq/index.php?threads/the-call-corpses-poof.272355/
to clarify, for me, the mission loot has always been fine, its only the items off of vulak aerr itself.