Outlook Desktop App Navigation Pane Customization
The ability to customize the navigation pane in Outlook's desktop app would be huge boon for many users. The option has always been included in previous Office versions and there isn't a good reason it should removed. A good example would be the visually impaired who are no pigeonholed into your design flaw. I know this has been brought up frequently by users and the lack of any communication or action is very sad and anti-consumer.