I would like to have, if possible, the chance to create notes in attachments the same way I can create a note in a Task or Artifact.
This way, if I am doing an analysis of a file I can be adding the information in a note and if in a future I need to create a report from that attachment, I only need to look for the notes of that specific attachment.
Another improvement could be adding the information you get from the artifacts regarding an attachment into that attachment notes.
The main reason is to have, as I said, all information regarding an attachment together in one place.
Those notes could also appear in the notes tab as task notes do, something like:
User ABC added a note to the attachment XYZ