Binding multiple commands to single key can be very useful, e.g. Right mouse click to zoom/hold breath when held, and toggle aim down sights when clicked.

When I try to do this with keyboard bindings such as left shift to toggle combat pace, and holding left shift to temporarily walk, It does not work as well.

It will make your character/crosshairs momentary stutter, trying to preform both commands.

Allowing the user to bind actions to keys when held down OR not held down longer than .X seconds might fix this issue, so that is preforms like the default Right mouse click.