No doubt the experience accumulated during the search for AF447 will help. The difficulty in mid-Atlantic, between Brazil and West Africa was the underwater terraine, the Ridge being bisected by the Romanche trench, the third deepest in the Atlantic Ocean, and with a profile resembling the Himalayas.
The underwater terraine of the Indian Ocean may be less challenging. However, the CVR won't tell us very much, being overwritten after 2 hours....
and it is very unlikely that technical difficulties were involved in bringing down the aircraft.