It seems to me that you people are forgetting that
"the pilots considered that the current flight plan was one, while the flight controllers considered that there was another" and
"the Air Traffic Control radiocommunication system, from an exclusively technical aspect, did not present failures, because other aircraft that flew over the region of the accident, including some close to the Legacy N600XL, did not have any communication problems". Your examples are very diferent of what really happened. GlueBall, for instance, imagine that in your filed plan you were supposed to climb from FL340 to FL350 over Arabian Sea because all planes in the same direction as you goes odd levels and against you came even. What did you do? Would you keep FL 340? I'm not a pilot, but I would never do that without ATC give me a good reason
