The 'Time in Heart Rate Zones' chart should update to match the zones set in the athletes settings. Even after setting the chart to the last 7 days to be sure all workouts were completed with the new zones, the chart still did not update to the new zones.

At a minimum, make the heart rates for each zone visible by hovering over the chart or something. Zones that don't match what is in my athlete settings and that also don't show on the chart what heart rates align with the zones are effectively useless.