Yes -- BBT supports dynamic key reassignment which you can disable per item, and I want to display this status.
I am also trying to work out a way to do citation keys for read-only items that have no key; generating them isn't hard (most parts in place), but it might be possible to get the citation key editable (for local, non-DB save) for read-only items that have no citation key. I would want to have that status visible.
But it's mostly flourish. Nothing critical.