I know that you've put a lot of work into it, but a sandbox option or an audio setting to bring back mute characters would be great. I'm really not a fan of the character voices, and I think it kinda overwrites some of the "roleplay" aspect the game has. With the player voices, you don't imagine your character as they are, the game will assign you a voice and you need to deal with it.
Also, inevitably, no matter how many voices you include, you'll start seeing repeats, or even have two players in the same server who have the same voice. I don't like that, personally.
Not asking for it to not be added, just to have the option to turn it off.