Changes to deafness and blindness traits

[RSOD]

i don't know if having them be "you get only one" would be fun, especially if you're trapped by flock or some staffie decides to steal it for the funny
maybe make it so hacked medical fabs can make upgrades similiar to that of the glasses, each visor only being able to hold one. not sure how to do it with headsets, but maybe just tap a headset on your hearing headset to get it's channels?