I'm following Brian Petersons guide the way he teaches you to learn...
You start by using the settings the flash tells you, once your experienced enough you can do it how you wish.
I assume it's like when I learned to shoot in manual.... You start by following the rules he'll tell you iso 200 f 11 shutter speed 200 (or whatever) then once you start understanding how it works you realize how to choose what you want.
I think for camera exposure settings, which are nearly universal across all makes and models, the training wheels approach is a valid one. In this specific example of flash though, it's investing time in a feature and technique that becomes unusable when you take the next step. It's easier and less confusing to just skip this step IMHO.
As I stated above I’m purchasing a canon flash and will experiment and hope it works.
The 600ex-rt does have a way to show distance information, but I've never enabled it. As soon as you put any kind of modifier on the light (Sto-fen, light sphere, Rogue bender, umbrella, etc.), or add another light, that distance information becomes useless.




