Presently, "S" brings up the Sketch Toolbox- the customizeable tool crib -but that's where the work flow comes to a grinding halt: making a selection requires finding the tool with the pointer, clicking.
Proposal: when the Sketch Toolbox is open, regular hotkeys are deactivated in favor of customized hotkeys assigned to tools user-bound to the Sketch Toolbox.
What this would look like:
type "S"> type any hotkey
Now both hands are free to contribute in tandem- keyboard and mouse - instead of trading back-and-forth between tasks neither is perfectly suited for.
Easy-peasy, lemon-squeezey.
Number of users who want this: 100%. The number of developers that don't is the mystery.