If the volume rocker didn't already serve as a mute, or if this new one actually worked, I guess it would be okay. I'd actually like to see it used to go into app switch mode instead of the dopubletap home button.
Or God forbid, have Apple let us choose what it does! But hey, they don't even let iPhone zombies choose notification/mail tones, so you know that's not gonna happen.
I'm not buying the "I cant find the switch" argument. If you know where your home button is, then by default you know where the switch is.
I do read a lot and sometimes watch tv shows/movies in bed with the ipad at strange angles. This causes it to rotate undesireably now and then. I miss the easy switch.