In previous statements I believe the stated goal was the recovery of bodies. The divers reported that entry into the fuselage was too difficult hence the attempts to raise the fuselage to the surface so as to be able to search for bodies in a safer environment.
In terms of forensic analysis of the wreckage very little will be accomplished because of the destruction we have seen to the tail section and now the centre section during and after recovery. Some deliberate some accidental.
Sadly I suspect that CVR, FDR and whatever chips are recovered from other systems will be the only credible evidence left.
Whether this is a deliberate policy or just a by product of the "recover bodies as the highest priority" remains to be seen.
This is not intended as a criticism of the divers themselves who are working in a very challenging environment, rather that of the policy makers.