It would be really helpful if you could add the "post-it tabs" feature, or if you could make the "text" feature collapse into an icon to reduce the space usage.
And to make the "multi-level lists" feature easier to use and to create more bulleted lists (for example: numbers, letters and other forms or shapes).
I do really love the GN6 app, I've been using it since high school many years ago (the app version was still GN5) and I would be very satisfied if you could add more useful features and functionalities.