So Im Using GoodNotes for some time now and imo there is some Features missing:

• Color Picking tool (tap on the color to copy it and use it on a pen or marker till its being changed)
• Mathsymbol Converter or Mathsymbolpaster
• Advanced Drawing mode:
  • Dotted Lines/Objects Mode
  • Drawing Symmetric Courves without adding them together
  • Aligning Lines
    
  • rotating Drawings without changing their Size
  • Layering [Would also be nice for studying with the folders to make some sort of "Tap on the field to show solution" outside of the learning cards]
• Optimized Textfields:
  • single field
  • Squared area

And if its possible to make the Applepencil Recognize tripple Taps to switch between tools quicker