I like the humour and personality that the robot voices adds to the game; however, at the moment it seems to me like there is just one robot voice that gets picked for any particular circumstance. I understand that this may not actually be the case and that there may be individual responses for certain robots, but even if this is the case it doesn't seem like it. I know more work is planned in this area, so it'd be great to know exactly what changes are incoming, but really here's what I would like ...
Individual voices for every type of robot!!! ......before you rightly say "your crazy kid, we're an indie dev, we can't afford all that voiceover work, get out...now!" let me suggest something.
Instead of re-recording lines for every single robot, would it instead be possible to devise a robot voice filter for each type of robot? Then, using the existing raw vocal audio you could apply a variety of different filters in order to create a much larger pool of audio lines, each with different tone and a more specific identity. Think of it like an audio palette swap. This might work out great! At the moment, it's just that one low pitched robotty sound that does get a bit old and seems to apply to all robots (maybe it actually does not sure). That's about it, just throwing this idea out there.
(Yes, I realise filters for every robot type is pretty extreme, but you could instead just apply filters to certain categories of robot, for example large robots versus small ones ... you get the gist)