“What are the corrections for this exercise?”

From where I sit, there are no corrections – just unexplored possibilities.  What is usually required when the movement you see isn’t the solution you hope for is a fresh perspective for that person’s nervous system.  Your cues may not have captured the essence of the movement for that person’s unique brain, their experiences, associations and emotions.  It doesn’t mean that your cue is wrong – but that greater clarity about the movement’s intention, direction and qualities is necessary.

So the answer to the question is not what corrections you can make, but how can you speak to this person’s nervous system in a way that is easier for them to understand.