Add a 'Team functionality", which allows for more multidisciplinary collaboration with nutritionists, doctors, physiotherapists...
For example,
a kind of diary/annual plan, in which the workouts are less detailed but especially the detailed supplementation schedule can be added to certain periods, where altitude training can be planned, where medical reports/check-ups or physio screenings can be uploaded...
Ideally, this would then have an output function/reference/link to the detailed workout schedule.An overview of all the 'team members' with a brief summary on past training load, injuries, HRV/RHR, their next race goal... could be interesting as well.
Having a possibility to chat with other coaches, nutritionists, doctors through different accounts about a certain shared athlete will be really beneficial as well.