Make the settings user friendly, such a dark theme for older people, it makes it easier for them to read.

Make the "Day, Week, Month" a latched setting. I need to see what is going on for the month and would like it if I didn't have to switch every time I go into the calendar screen.

What reason did Yahoo have to take away features that people like? Updating software is performed to improve functionality and accessibility, not to do the opposite.