This thread is more informative than the TV Show although it had some pictures, almost needed a 2 hour show to explain both crashes in detail.I can’t watch this sort of show, as the lack of integrity normally bugs me too much. How was MCAS described....what was it’s purpose?
As for slowing the aircraft....nice idea, but pulling the power back would give a strong nose down pitch change. Speed brakes would give nose up, but not of the same magnitude, so overall it would simply add to the problems.
I guess Boeing thought that all you need to do it cut the switch and everything will be fine and you could fly away happy.