It'd be a lot of work to get right, that's true. With unlimited time it'd be interesting to test, but I also don't like how it would turn listening into a much more important skill in Cogmind. Right now you can play fine even with the sound off. (True we do have visible sfx now, and that system could also reflect a new set of "robot sounds," but then you basically have free sensor arrays
)
I do, however, have different robot sounds for all major NPC dialogue. The idea was to possibly do that for all robots, but again that's a lot of work and probably overboard for what you get out of it. Having it only for major NPCs helps them stand out more, anyway.
Specifically regarding movement, sfx aren't appropriate because they would get too repetitive. Foley like that also works much better when you have different terrain surfaces, which Cogmind intentionally does not
