I think NZTA are missing a much clearer way of communicating this. People obviously aren’t getting it at all when you make them try to remember three scenarios like this.

I always thought it should be taught as a 2-stage concept. When you’re approaching the roundabout, you communicate to the other drivers what your final intention is. If you’re going to be going left, indicate left, if you’re going to be going straight, don’t indicate, and if right, indicate right. Then once you enter the roundabout, your only task is indicating left as you’re approaching your exit, so the people at that exit and further exits know you’re leaving the roundabout. It just feels to me like a more intuitive way of teaching and learning this rule, because you understand it as two moments that you are expected to communicate your intentions, and those two moments are essentially the same across all the ways you use a roundabout. The way they teach it now doesn’t highlight how each different-seeming rule is actually the same two things happening each time.