As a onewheel owner, one feature I think needs to be eliminated from the device are the "digital shaping modules" that allow you to modify the behavior of the board via software. It should has only one mode, which is "do everything possible to make sure the user doesn't crash"

I only had one fall on my onewheel with ~2 years of use, and that was when I was testing one of the "smooth ride" software modes and it therefore didn't move forward as quickly as I usually expected (because it was emphasizing "smooth" over "responsive") causing me to fall forward. There was absolutely no good reason for that fall to happen, I think.