But, frankly, there's no way they could have left the crew out of the "probable cause". Even if others created the opportunity for an accident, the actions of the crew were required to bring it to reality.
I agree, after going over this accident I would say the biggest contributing factor is inadequate signs, the airport was already a confusing layout, turning off edge lights isn't as big of a clue as some people are making it out to be, the bright lights of the aircraft along with the angle of their flight deck, ambient conditions getting lighter. No need for moving displays if they would have spent $500.00 dollars on signs.
This operation could have easily taken place at an airport without an operating tower, let's not blame it on ATC.