Dont need them to click. Thats only for sprinting or crouching in shooters really. Plus in shooters I dont think you should be able to crouch at all. Always facilitates me off. As for sprinting just tap the touch screen.
If you play COD you have no right to want ANYTHING in ANY video game.
Crouching with clickable sticks is crap. Knifing in CoD isn't my favourite thing to do either.. For running it could be pretty useful. And no crouching in shooters? Then how do you want to get some good cover?