>at night, over an ocean, in a storm, with no visibility, in possibly significant turbulance
Instead of finding out strategies on how to fly under these circumstances, why can't the plane change its course, if they anticipate the flying route to have these conditions. How about running some reconnaissance drones in the popular routes if they suspect a bad weather and want to check out. Or try out better weather monitoring methods and tools on these routes.
Edit : Ok my mistake.On reading again, the article states "Unlike other planes' crews flying through the region, AF447's flight crew has not changed the route to avoid the worst of the storms. ".
1. This is a region that is quite regular with thunderstorms. The captain probably assumed this was like any other storm in this area any other day of the week.
2. This route is at the upperlimit this plane configuration can fly. If they had to reroute they would need to stop and refuel in another country, possibly Spain, Senegal or Morocco. I assume the captain didn't want to do this and soldiered ahead.