I recently switched to Summit, and keep accidentally activating the "shake phone for feedback" shortcut. I feel like I saw the option to turn it off when I first went through the settings, but I can't find it now, so maybe I misremember? If it's not an existing feature, consider this a request =P
As a normie (at least in these circles), I think I agree with your last point. Windows being heavily restricted in its customizability is a feature. A bad feature, but a feature nonetheless.