I have already voted for this but thought I could add a more detailed comment as well.
We are considering moving our entire organization to Fibery. The database/relations functionality is really good.
We are also planning to move all of our documentation to one place (and that would be Fibery). I personally think some small enhancements to the document editing would have very big improvements to the look and feel of Fibery as a whole.
It would be very nice to have an automatic Table of Contents block based on headings (or similar) as some documents can have a lot of information.
A workaround right now is to break up a document into smaller documents and link to them instead but it doesn’t always make sense to do so.
I honestly wouldn’t mind creating manual Table of Content lists but there does not seem to be a way to do internal links yet (as mentioned here). It takes away from the look and feel when a new tab is opened instead of jumping within the same page.