Broken keys from chests should have an Eroded token
This would make broken keys from chests have a function(A limited mini Bond) if you don't have the "Ace in the Hole" perk.
Also "Ace in the Hole" should be able to over ride the eroded but only with other aura reading addons just so the perk doesn't give you a dead broken key.
Comments
I feel it would be weird to make an exception for just one item that is already "broken" in every meaning of the word. It's always been a kind of gag item. I would be more in favor of simply removing it from the game, and buffing dull keys to have 10 second use instead of the current five.
Imo purple and red keys should be unplunderable and all broken keys should come with at least one addon when plundered.
Giving it a passive ability (and increasing it's uptime) could also work?