Have an option for those with only one hand/arm
I have limited use of my right hand. I can get by with most things, but occasionally I'll have to swap controllers or use my left fingers/thumb on the controls of the right controller. It can be an awkward experience.
I know this might be impractical for some games, but for those of us with limited use or limb loss, it would be great to still be able to play with the option of 1 vs 2 handed controls.