My understanding is that there is no 'best option'. Dual input is a situation that shouldn't ever happen while a crew is flying according to protocol.
In AF447 it has been established that the crew failed to follow multiple protocols, ignored warnings (including the audible "dual input") and while design / instrument improvements have been put forward, it's not clear they would have avoided that tragedy. The conflicting inputs only happened during the final seconds of descent.
In AF447 it has been established that the crew failed to follow multiple protocols, ignored warnings (including the audible "dual input") and while design / instrument improvements have been put forward, it's not clear they would have avoided that tragedy. The conflicting inputs only happened during the final seconds of descent.
Here's a good discussion on the why: https://aviation.stackexchange.com/questions/23577/why-do-ai...
The latest Boeing 787 has switched to fly-by-wire.
EDIT: an eerily straight-forward report of how the AF447 flight came down: https://www.popularmechanics.com/flight/a3115/what-really-ha...