Regardless of the final analysis of this crash, it is time that the lack of automated low airspeed warning on approach is addressed. A stick shake at just before the stall is useless on short final. Average line crews have repeatedly proved they are incapable of reliably manually monitoring airspeed when their normal operating mode is ATS or A/T. Modern Nav is quite capable of calculating airspeed and I propose that a suitable audio warning system should be integrated that corelates energy/speed relative to config and approach speed, NOT just Vstall! Just my opinion.