Get Multiple Crown of the fire festival
Not very big, but once you turn in the thief's reward at one of your faction's capital cities, you can still go to Shattrath and claim it again, in case you may have sold/deleted yours, or if you want 2 crowns for some reason.
Short and simple
This is a result of the reset, if you have not completed the quests required for this before the reset then this will not be the case.
Additionally, any fires you did before the reset you can do again for money / experience.