I only need ONE improvement! Battery life. My girlfriends SE and my 13 mini have both had inexplicable battery drains, going from 100% to shut down within an hour (while being in my coat pocket). When looking in the battery settings it says that Mail used 100% battery during the very steep decline in battery life. Never happened previously. Seems like with every new iOS we have battery issues. This is the first time I have been affected, though.