It'd be nice to be able to "archive" (or mark as read) flags instead of just removing them, to be able to review them in the future, and see for example what was the action taken by another mod.
Sometimes I see a flag asking to delete an answer or a question, and I'm not quite sure so I don't take action, only to see the flag later removed, not remembering what post it was to see if a fellow mod delete it or desestimated it like me.
It could be useful to have that list of flags in a post for reference also, now I'm annotating users but it just doesn't seem to be the correct place to leave this reminders, and it also doesn't solve losing transparency on other mods' actions.