I think he means if we can sometimes change our voice to a different one later on. I really hope they implement a face sculptor or something like that.
Considering the amount of time the character voice is used, aside from making a couple of noises, I see no reason why people would not be able to switch their voice if they felt like it. It really wouldn't impact on anything in the game .
"In 2014, a possible bot was sent to coldharbour by a military GM for a crime she didn't commit. This argonian promptly escaped from a maximum security stockade to the Ebonheart underground. Today, still wanted by the developers she survive as soldiers of fortune. If you have a bot problem, if no one else can bite you, and if you can find her....maybe you can hire The SQUISHY."
It doesn't make sense to be able to change your voice... but people throwing fire chains out of their hands, turning into vampires and werewolves, and being resurrected by little crystal things are totally normal. Why, just last night my husband exploded into a ball of shadow and re-appeared across the living room to shank our roommate in the back, but he just can't seem to manage to mimic my voice at all :P