Shouldn't that be, "It reduces that character to something seen and not heard?" Hey I would prefer a close long time buddy of Big Boss to have that situation where they can't talk due to a injury (phantom voice), and spoke through, mannerisms, sign language, or morse code. It would be pretty interesting maybe, but it would have to be someone that isn't in the future Metal Gear games, unless they are given a voice via nano machines, or some crazy tech. From the sounds of it Big Boss doesn't talk much (expensive voice actor?).
Women talk a lot as well as men in the past MGS games. A lot of Metal gear is happening because of the words of The Boss, aka Voyevoda, aka The Joy, aka Mercury Lady. Is there no women talking in this game? I honestly don't know, just now thinking about it, I just watched youtube videos for cutscenes. However I do know mother base can have women solders and they talk, like the men soldiers, when you speak to them and such now that I think about it. Are there any other women characters outside of the nurses and Quiet? (spoiler tag it maybe)