I used you application for this ) I am not sure you can add any modes that would be helpful,
tello has a small res camera and you have to get pretty close to some things and at over 6-7m height its not super stable. So it's all manual line of sight work. Also 95% of the time you will have trees very close to your object + wires going from a building, any autopilot without collision sensors is probably a bad idea.
The most valuable thing would be raw photos or some sort of sharpening/improvement of the photo quality on the
tello side.