The editor bar right now contains, from the left:

• Insert
• Undo
• Redo
• Document Structure (word count)
• [space]
• Save state
• Preview
• Settings
• [future extension area]
• Ellipsis overflow

The Document Structure takes up highly valuable real estate on the left, where the most important button of them all, the inserter, sits. It even has a similar roundish icon. While we could look at addressing that, instead what if we rethought the position and feature a little bit?

We would rewrite the feature to be a native editor extension (see #3330), enabled by default. You'd be able to "unpin it" just like you can unpin a sidebar, at which point you'd have to get to the feature in the ellipsis menu.

Quick and dirty mockup: