It's so cute how they go out of their way to find something positive to say about the phones... "I have some other ideas for the Action Button, though, and the beauty is you can experiment with it until you find something you like."
I'd find a button that's actually useful without having to try so hard to figure out some use for it. You can use it to activate and use the camera, but the old way is just as good as the button is in the wrong place. I'm holding my breath waiting for someone for find a use for this magical button.
Of course, earlier you had a physical slider to put your phone on silent and you could see with a glance whether it was on or off. Now you have a button you can accidentally "long press" while it's in your pocket, and I'm not sure if the silent icon stays there constantly so you have at least some way to actually confirm whether you have ring on or off.
What comes to moving to usb-c, I find that in all ways positive. I haven't bothered to purchase any lightning gear because they go obsolete so fast anyway, and I much prefer having usb-c chargers all around rather than having to lug around the lightning cable, too.