Interesting. I’ve always been fascinated by increasing efficiency in humans. I have never found a GTD app that works for me. Unfortunately, yours still doesn’t do it for me. Why? To be very blunt: it’s not very visually appealing. I have no desire to install that app on my nice, shiny Apple product. I’d really recommend hiring a talented visual designer to redo your visuals.
I really like the idea of scaling individual items to make them more important.