As you say, old news. Some of the sectors are so long one has to have a power nap!
What is needed are "cockpit monitors" - inexpensive crew members who can work in shifts and who are trained to listen out for the aircraft's call sign on the relevant frequencies while sitting at the back of the flight deck. If anything urgent crops up they can then wake one or both crew. Otherwise the flight crew should be left to rest so that by the time the landing comes they are refreshed and not exhausted.