I agree, both of these changes are... perplexing.
With the bluetooth - off should be off.
If they wanted a 2-step process you should be able to tap for disconnecting current connections and then have the option to press & hold to turn off. You shouldn't have to mess around switching into settings to toggle to real off.
And that QR code scanning has already driven me nuts.
Who on earth thought that was a good idea? A tiny, little floating button that disappears as soon as focus is lost on the QR code.
The previous way it worked I could hold my phone with one hand as I walked towards a code, it would grab it, I could press & check-in all without even slowing down as I walked.
Now I have to put my glasses on, centre the code, stop & stand in front of the code holding still, chase the floater around without moving off focus & then log-in.
It's turned a smooth & easy process into one where you have to stop, use both hands and, if it's busy, slow down a queue.
All-in-all the absolute opposite of what changes in functionality should do.
Seems to me they fell for the old 'form over function' trap - it looks really groovy but it's a retrograde step in functionality.
Having been a Mac user for a loooong time I have to say they do have an annoying history of removing sensible functionality & replacing it with stuff that somebody apparently thought was a good idea.
Two in the OS that to this day still irk me are changing file & folder coloured name bars to tiny coloured dots and removing 'Open in new window' as a system wide setting/option for folders.
Many times I've been left scratching my head at why they thought these changes were sensible and, more to the point, why the 'old' style isn't just left as an option in settings.
