Basically with ALMOST any function in C1 or Davinci you can go to settings, find this function and set or change a shortcut associated with it.
I understand there might be some limitations, but between limitations and no custom shortcuts at all there is a whole playground of customisation possible.
For instance, from the top of my head, would definitely change the shortcut for reloading the code replacements and set up a shortcut to filter out zero stars. I know there is a shortcut to select 1, 2, 3... stars, but I'd like to glance over the selection without the outtakes.
Simple start would be - if there is a keyboard shortcut for a function - we should be able to change it.
And next step would be ability to add shortcuts to functions that do not have shortcuts yet, like filtering, custom editors.