When I saw the book mention below the first picture, I thought I misread and that this first picture was just the starting point before being inspired by code analysis found in the book. I imagined a new , more efficient, principled layout.
For example, I'd think about reclaiming the top row, where the numbers live. On keyboards with a numpad, they're passengers. At the very least, invert the meaning of shift, so the default is to produce sigils.
