This is a weird one, but I’d love to see a reimplementation of the sensor bar. The gyro controls haven’t cut it for me. I like how the Wii U game pad had the sensor bar built in to the bezel. The real engineering nightmare would be squeezing IR cameras into the top of the Joycon
I loved my wii u and was disappointed when the tablet screen didn’t get used. If it was more successful (as the switch has been and hopefully how the switch 2 will be) then it probably would have been better utilized.
The Wii U Gamepad was originally planned to be the “map” part: https://youtu.be/SECWlFInyFM?t=42 … so yes, it definitely would have been utilized better.