I was thinking that since your Transport Drones mod has the concept of fuel for the transport drones, why not have a fuel-like concept for these human drones?

The drones have a "stamina" reservoir that gets exhausted, when they run out of stamina they go to a dormitory/boarding house kinda building that generates this "stamina" resource and slowly refills their reservoir as they sleep in the building'.

Again, the concept of "road" from Transport Drones can be reused to make "streets" that tired mining drones can walk on. This can totally change the way Factorio is played and bases are designed. This can introduce more compelling problems, like making residential districts.