squawk ident, thank you for the update.
That would seem to be a very fast recovery rate, given the time it takes to get to the bottom and then back up.
It may be that the Ile de Sein's crew change was to bring aboard more members of the National Gendarmerie.
The Head of the GTA’s Investigation Unit further indicated that the recovery of bodies is an especially difficult operation whose success in uncertain. Should it succeed, all the necessary arrangements will be made on board by IRCGN* experts whose team will be strengthened. The identification procedure will later be performed in France in accordance with international
protocols.
http://www.diplomatie.gouv.fr/fr/IMG...fo_anglais.pdf
* National Gendarmerie’s Criminal Research Institute (IRCGN)
Speculation, but this recovery phase may be concentrating only on recovery of the bodies, and once that is completed, the Ile de Sein would again swap crews if any other parts of the plane are to be retrieved in the future.