contactower makes a good point.
it would seem that at 600feet the crew tried to get more power...and it didn't happen.
if they had tried at 1500 feet there would have been more time to react
Tried WHAT at 1500'? Over-riding the auto throttles to add more power when there was no need to add more power?
Both you (sevenstrokeroll) and "contactower" make no sense at all.
The auto throttles are very precise and add or subtract just enough power to maintain a stabilized approach (descent) while responding to different wind conditions during the approach.
At 600' the conditions changed and that required more thrust to maintain a proper descent. No additional power was available and THAT is why they landed short.