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
A much smaller bezel. It’s so big on my original Switch, and the screen could be so much larger and prettier if it went nearly to the edges, without making the console larger at all.