I'd like to revive this idea. I agree that getting them set up once and then leaving them alone is USUALLY the way it's done, but the initial setup is still a pain. Plus I sometimes like the idea…
Some of the newer watches do this now from the Garmin Connect Mobile app. For example, with my epix Gen 2 watch I can configure all of it from my phone.

Which device do you have? Some allow some customization of the data displayed already (by way of the device itself or Garmin Connect.)
I'd like to revive this idea. I agree that getting them set up once and then leaving them alone is USUALLY the way it's done, but the initial setup is still a pain. Plus I sometimes like the idea of tweaking things from time to time. So please Garmin, let's see if we can get this one done!