Ratherbeflying,
Retrieval of bodies in this state can be very hard on those involved, and it's likely completely impossible to treat such remains in a dignified manner.
With all due respect to the relatives of the pax and crew, the need to mourn the dead isnīt the only factor playing here.
I bet a lot of people wants the bodies to establish the right to have a claim against AB and AF. Brazilian law, for example, is a little bit tricky in this aspect, although the brazilian Minister of Justice tried to assure the relatives that the lack of bodies would not be a problem.