You don't have to hold down shift to walk instead of run in a console shooter; You have a sensitive thumbstick.
Great. So instead of simply holding down a key or using a _crouch or speed toggle key,_ (and often having the option of doing any of the above) I have to carefully regulate how hard to tilt a stick relative to the rest of my hand? I'd rather take the key--my fifth finger isn't usually doing much besides controlling speed. It actually goes completely useless (balance aside) when using a gamepad because there are so few functions on them.