The power button should be left where it was the last time. To access the power button I have to do 2 swipes on the notification panel. It should be next to the settings button on the 1st swipe down not the 2nd in my opinion.
A complete overhaul and Re Design of the home launcher. I have used Lawnchair and Nova Launcher for years on my Samsung phones. I Prefer a more stock google like launcher and One UI home launcher is a bit to child like