207592:
I agree, ATC emergency messages should be just that and not combined with other information.
Message should be clear and brief.
A message such as "EZ 123: cancel take-off clearance" is not clear and does not convey a sens of urgency
Why not say something like "EZ 123: STOP AND HOLD NOW" repeated twice
Same for go arounds': "EZ 123: GO AROUND NOW" "EZ 123: GO AROUND NOW"
when crew acknowledges, ATC can go on with further instructions: "EZ 123: maintain 3000 heading 180...." or "EZ 123: take-off clearance runway 27..."