I have a comment about the indicator panel at the top of the phone.
I have a very 'ubuntu touch' use-case that made me think about how the indicator panel is not good for 'urgent' use and can be a hazard for emergencies.
Summary: It is difficult to use the panel quickly and even more difficult when you can't see the screen well.
background:
To use the activity tracker when cycling I need to keep the app open. I use the active screen click to stop the phone from locking screen. To stop the battery from dying after 5 minutes I turn the brightness all the way down and turn off automatic brightness.
To use the phone when I take a break I need to turn the brightness up manually.
Issue:
When the brightness is all the way down, I can't reliably turn the screen brightness up because the scrolling behavior of the panel means the screen 'button' is never in an expected place. With Android I know to swipe down and the buttons are all in a predictable place so even if the screen is dark, I can get the slider with a few attempts.
In UT it is very difficult.
While this came up in a very niche (ubuntu touch-esque) use-case I think it has implications for everyone else in some emergency situations.
Eg. needing to turn on mobile data to make a call if you get an eye injury.