On the one hand, I would find importing files very important. In addition, I lack the function to insert my own pictures or pdf's as a booklet template. There are too many differences in the thickness of the pins. The smallest step is too thin compared to medium, which is already very thick. Otherwise, maybe text fields or similar for typing with a keyboard. In addition, of course, sharing or exporting would be very helpful. Maybe just have a look on some functions of Goodnotes 5.