By the way, I really love the aesthetics of the waist-level finder. I think it is beautiful in it's simplicity!
I think the WLF does give one the option of shooting from lower angles, too, and if shooting from the hip is an option with such a large and heavy camera, this is the closest you'll get to it . I have found that people subjects react differently to the WLF compared to an eye level prism finder. It is as if they find it intriguing, and the facial expressions are therefore often more interesting.