I disagree, there's lots to improve on that "regular users" would notice. I went from an 11 (non pro) to a 15PM, and there's still a few major gripes I'd like to see fixed that haven't been addressed in the 16, but would benefit regular users if improved:

- I wish my phone was easier to unlock when outside in the bright sun and wearing glasses. I often have to take them off or try again, or put in a passcode.

- I'd like the screen to not dim after a few minutes outside in the sun.

- I wish my phone charged faster, especially for moments where I'm like "Oh crap, my uber will be here in 5m and I forgot to charge my phone"

- I wish my safari tabs didn't attempt to reload at the most inopportune times (or ever like my Macbook). This is a very real scenario I run into often when in the subway with no cell/wifi, and is extremely annoying. Better than my 11, but not fixed by any means.

- I wish my OLED screen didn't have visible PWM at low brightness, and strained my eyes. Not everyone is sensitive to this, but some are, and I didn't have this issue with my 11.

These are all regular user stories.