Glen:
I am sorry, but you have over complicated the high jump either to a coach who is new at it or an athlete who competes in the event. This is the second least complicated jump of all the jumps. For a flop approach, one would finish their approach on a curve, whether it’s a constant radius or a tightening radius really needs to be the jumpers preference. A curved approach with a natural inward lean (away from the bar) from running the curve is needed to successfully execute a flop high jump. This curved approach is what gives the athlete the necessary rotations to clear the bar around all three axises. The biggest problem with high jumpers is coaches allowing them to get too close to the bar, letting their athletes square off an approach, and coaches not understanding that the path of bar on a missed attempt should have a direct correlation to a flawed approach or the athlete is at their maximum height.
Also, the feedback and communication between athlete and the coach should be positive reinforcements of what to do that they messed up and not negative reinforcements of what they did. The best example i can give is of an athlete who jumps into the bar. I often hear coaches at meets or at club practices repeating that line of “you are jumping into the bar” or something very similar instead of focusing the athlete on maintaining a curved approach which will prevent them from jumping into the bar.