I would love to see the option to toggle more voice response to things that happen in-game. Specifically, a voice/audio event for when unidentified signal sources pop up in supercruise would be fantastic. Other events like warning on weapon power levels, shields being "low/50%/25%/10%" and not just "offline," vocal responses on heat levels (i.e. "Heat levels at 100%/125%/150%" and not just "Heat levels critical" etc.), voice responses for "Slow Down" and "Safe Disengage Ready" when in supercruise, etc. Basically anything that has a visual feedback component, have the option for an audible feedback component as well.
Again, these would be options, with toggle switches like the current audible feedback in the options menu.