From what I read, each dungeon has updated increased daily rewards, like Tier 3 lightless has increased exalted helmet drops on a specific day.
This is nice, because it helps faming specific exalted items. would be it possible to see those rewards before putting the key?
If the tier 3 is swords and tier 4 is maces, as a mage, you may not want to farm those today and end up losing the key used to just to see the rewards