Frustrating as it may be to those seeking answers, this is a recovery operation, not a rescue. The data recorders have been recovered which should go a long way to determining the cause.
While recovery of the remainder of the wreckage and/or casualties is highly desireable, neither justify risking the loss of further lives if conditions are too dangerous. It is just as important to know where to draw the line when attempting these types of recovery as it is to keep an aircraft on the ground when the weather conditions dictate.
Exercising patience and extreme caution are the only way to proceed with this operation and an acceptance that sometimes the sea refuses to yield its' secrets.