Minecraft isn't a problem at all, it's a sandbox game where it's implied you make your own fun. Depending on the levers you give the agents, it may or may not be a robotics problem, but it most of all depends on the task you give the agents. The task they were given in this case was pretty lame in my opinion ("build a civilization"), and it's no surprise they were bureaucratic and ineffective. It pretty much goes with the genre.