Use case or problem
I really like link previews and use them all the time, also in edit mode with Ctrl+hover. When I do, I often find quick edits to make in the previewed pages. At such point, I can either break my primary editing flow and go edit what I previewed - or not, and be left with a bit of a distracting brain itch
Simple: Editable page preview frames, when in edit mode. Let them show raw markdown and allow for making those quick edits in the preview frame. Can be accessible through Ctrl+Alt+hover or Ctrl+Shift+hover to differentate from the existing preview.
Advanced: edit / preview mode toggle for individual preview frames.
Ideal: all pages and previews WYSIWYM editable
Current workaround (optional)
To make an edit within a preview frame I need to move mouse away so that the frame disappears, Ctrl+Click the link, jump to the page or section I previewed, make the edit and return to the place I was primarily working on.