I just thought of a feature that would be quite useful: being able to display a preview of each document’s text or description in the document browser.
Evernote and Scrivener have something similar, and it is quite useful for quickly remembering what a document is about.
Evernote’s snippet view:
Evernote’s card view:
Scrivener’s index card feature allows the document’s description to be displayed:
Also applies in Scrivener’s outline view: