Help / Status box set by workflow
Under suggestions from your team (Mathieu), I have started overloading the "description" field as a place to put workflow specific status and help text. This works great and gives me a much more usable UI for the user.
I would suggest rather than overloading this field, that we be given a panel specific for this purpose, that is not editable within the document, but rather is set by the workflow and by script. Within the workflow, it could be similar to notifications, where you can embed field values into the text, and use html.