Just as I find the Fitbit community outdated and messy, the Fitbit app itself is also appear messy and not up to date. If you compare with Garmin, Polar, Suunto and even Zepp, their features are far more impressive and consistent on mobile and watch. Here are some minimum requirement for Fitbit in my opinion:
1) Full sync with Strava and Google Fit
2) Training log in app and on watch
3) Weight and water intake in app and on watch (with log)
4) EKG log in app and on watch
