I'm moving my comments here because they were obviously too long.

Could you improve the animations and sounds, too? This mod is nice but you could make it even better.

1. The M.U.L.E. and Tokka very visibly don't touch the ground while walking or standing. Other robots do touch the ground unless walking backwards (more on that later.)
2. M.U.L.E.'s walking and running animations look very unnatural and unrealistic. I suggest copying real-life 4-legged robots, such as the one Boston Dynamics has. It has just 2 joints per leg like M.U.L.E. but it has backward knees - 2 leg parts of the same length, which makes it practical and, of course, realistic. And, since Atlas resembles BD's Atlas, M.U.L.E. could resemble another BD's robot.
3. Tokka's walking animation is ok but when running the legs move slower than they should. You could just re-purpose its walking animation into a running animation by increasing the walking animation's speed.
I think real-life bugs can only run and stop, not walk slowly - thinking about ants.
Making Tokka always run seems like a good idea, as it imitates a bug, right?
4. Atlas's walking and running animations look unrealistic (I can't really tell why but they do), and the backwards animations make it walk above the ground. Again, try to imitate 2-legged real-life robot such as... Boston Dynamics' Atlas.
5. Brute Brute2 and Atlas suspend their left legs above the ground in the walking backwards and running backwards animations (Brute2's running forward animation also makes it run "above the ground" although that's not very visible.)
6. The robots don't have robotic walking sounds and sound like humans. They're heavier though.
7. Tokka has no walking sounds.
8. Tokka splatters blood on the walls while healing.
9. The healing sound is too loud and sounds like punching a bag (and the characters moan like they were being punched.)

Bugs: The multi-tool accepts stacked batteries. They all get drained like 1 battery.
Tokka healed some of my crew members and stopped healing. it's just hitting the rest but not healing them.
Tokka hits/tries to heal crew at full health. It doesn't even prioritize injured crew.

I listed the animations that need improvement the most. If you had the time, you could even improve all of them.

I hope you'll improve this mod up to the Xan Monsters standard :)