I think there is a lot to talk about here. He was famous for using the grid, sometimes to an extreme degree. But he also believed in strong visual hierarchy. So as you point out, the larger knobs separating things out, the colors on his calculator, etc/
These were all good examples of visual simplicity and structure. Even his tactical sense with his concave buttons or ridged sliders were way ahead his time. But there's also room to criticize because he frequently used tiny text with low contrast ratios and had a blind spot towards colorblindness.
So I don't have the full story, but I believe this would be a really interesting conversation to have and to flesh out.