Right now, mining drones will abandon their posts and go fight enemies if a structure is damaged. This lead to me losing 120 mining drones an hour in to my deathworld game as I was trying to clear up a nearby nest. They just walked into acid and died.
Could the area by reduced for how far drones will travel to defend the base, or even have them ignore if buildings are being attacked and only fight if a fellow drone is attacked (or the depot)?