I personally find the voices distracting; I had a much easier time focusing on what was happening before they were added. Since there are separate options for disabling Music, SFX, and Enviornment FX, will there eventually also be one for voices?
Would it be difficult to have such an option also disable mouth movements? I feel like it would look strange to have characters mouths move without them saying anything (although if someone wants to see that for some reason anyways they could just set the voice volume to 0). Not really a relative priority, though.