Request:

Add a volume slider for the "yes sir" etc. unit responses.

Reasoning:

Currently they share a slider with notifications like "planet under attack", which you rarely want to turn off. You get tired of them after a while and some, especially some titans, are quite shouty. I also feel that they are .. well .. mostly very silly and out of place in an otherwise serious-looking game. You may not agree, and that's of course all right, but my guess is a non-trivial amount of players would like to have the slider and it's probably very very easy to add.

A master volume slider would also be handy for when you want to balance with a VOIP client or your own background music etc.