Select / Move / Transform / Duplicate
To move, resize and rotate, change color and change tool of part of your drawing. I would suggest you take a look on NoteAlways implementation of this feature as well. Also not a specific tool, just draw a circle around part of your drawing and a Hand icon appears, if you grab it, the circle will be ignored and the circled part is now selected for you to move/resize/rotate/recolor/change tool. Very natural and easy.
Auto line (ruler) and shape tool
When you need to draw a perfect line, rectangle, circle etc.
Moveable scrubber nav
Having the document scrubber at the bottom prevents me from comfortably drawing on the bottom part of the page. It would be helpful to be able to keep it hidden or move it to a different area on the screen. Edit: I noticed it does go away when you’re not scrolling but if my hand moves the canvas while I’m drawing, it pops back into view and gets in the way.
Cut, paste, resize
It would be great if I could cut, paste, resize my drawings. Because it lacks this feature I still have other sketch and drawing apps that I need to use.
Hide the Editor Tool
Would like the ability to hide the Editor Tool. It takes up too much screen real estate and interferes with working on the page.
Copy and paste within app
I would like to be able to copy content and then paste into another area of my file. The option to select and drag would also be great. And resizing the selected content, too.
Ability to save sets of brushes
I often use the same set of brushes for notes and another for sketching, it’d be useful to save them and quickly swap them out. This would avoid clutter and too much scrolling in the brush tray.
Ability to disable minimap
Even if I hide the UI, the minimap is shown every time I scroll, which is often. It covers much of the screen on the smaller iPads and I don’t think I’ll often have drawings/notes which are big enough to lend it enough value to justify it.