Apple tracking people? Really?
They've already said why they've done this. https://support.apple.com/en-us/HT208086
So, as somebody who once worked in AppleCare, I'm sure that you can imagine lots of non-technical people who used control center to turn off BT in order to disconnect a speaker and discover that their Apple Watch was disconnected, or their Apple Pencil stopped working with their iPad Pro, and couldn't understand why.
I hope that they add some way to turn off the radios from CC for more technical people like us. Long press on the icon? A third toggle as an option? This is obviously a controversial change, and Apple does often alter features in later releases when they've seen that a change is not liked. (Such as adding button shapes as an option in iOS 7.1.)
I never had anyone call in knowing about Airdrop, and I've never personally used it. I honestly never, in 4 years there, got a call (or at least enough to remember) to disconnect from wifi or a BT device. And I'd just tell them to do the "rectangle with a triangle in it" and tap iPhone. I got "why can't I connect?" but never the opposite. Most didn't even know CC existed, let alone how to activate it when I explained it.
Either way, they made a switch not a switch, and made it more complicated to actually turn things off.
Re:tracking, you can't prove a negative. You can take them for their word, but you can't *know* how or what they track. They say they do the fuzzing thing, but without a code audit, they could be lying through their teeth. Arguably, I can't prove it was actually off in iOS10 either, but as you said a long press could easily be used.