Scribe
Legend
I think it will be the best outcome. A point-buy system of advantages (not something that is unheard of in the field of RPGs...) that the player can attribute to race, star conjunction at birth, species, magic or simply I trained hard to become able to breathe underwater. Well, maybe not in this particular example... It will fit how many players (at least, the one I've seen playing) plays their characters (because Xeno-thinking is incredibly hard to do, much more than roleplaying a member of a different sex, context of even social class) leading the "plastic ear" accusation, will empower players to play what they want (a common tendancy) and end the controversy. Potentially insensitive depiction will be part of the setting, not the rules.
Yeah, not for me, but it does seem to be where people are starting to lean if they realize it or not.