Lead Invention and Design by Yumian Deng (LeapX founder, former DJI R&D lead/Product manager), along with DJI internal team. IP belongs to DJI.
Smartphone will be clamped right under the joysticks location, which is easy to reach with thumb during operation.
Buttons are positioned where your thumb can reach naturally while flying.
Comparing to the previous controller design, the Mavic controller reduced the size by 2/3 without compromising any features.