I adopt the old maxim, "Fit the image to the format". Rangefinder viewfinders are by their nature imprecise: you will get more in that you cannot see (same, too, with MF viewfinders that do not show 100% of the view).
Cropping is an individual thing: you can be for it or against it (as the argument in this thread vascillates to and fro...). I suggest you concentrate on what is right for you, irrespective of populist opinion.