I would like to trigger the "Lint" command or the custom second "Execute" command with a keyboard shortcut. If you want to introduce this with minimal disruption, just create the option to configure shortcuts for these in the preferences, but leave them unset by default.
To be fair, an Alt combination, together with careful placement of underscores in the "Set Build Commands" window, allows one to trigger them with just 3 keystrokes each. Still, needing only one would be nicer :)