The problem with redstone is, it made minecraft constantly crash, even doing a redstone limit on plots, if 40 people make machines that are constantly doing commands on a planet, you would lag out/not be able to enter or exit via portals, crash the planet, and still need a massive version update. Tho I understand where you are coming from with this, in minecraft we would tell at each other to turn off machines because it would make another machine not function, and they still have that problem a decade later.
Limited NPC would be cool as long as it was a stationary guy like in the sanctum with a limited interactive text.