I agree that the lock switch should have been left as it was.

However it is incorrect to say that the mute switch and holding down the volume rocker do the same thing, they don't.

The mute switch mutes notifications and things like that. It will not for example mute music playback. Holding down the volume rocker mutes everything (or at least I think it does, I'm not 100% sure that it mutes notifications).

Of course 99% of users will never realise that or understand the differentiation between the two functions. All a bit of a mess really.

And on the iPhone is a slightly more complex situation, as of course alarms can never be muted (which is actually a good thing from my point of view). I was surprised that Apple didn't implement the rocker hold function on the phone as well, it would be handy.

I was also surprised that they didn't include the Clock app on the iPad, very odd.