In the latest release of DevRel 69, usability and code improvements were a major focus, with new features such as the ability to switch between Kiosk mode and Multi-App mode at the group level, disabling the navigation bar on Samsung devices, and added sorting capability for device details. These changes aim to enhance user experience and provide more flexibility in managing devices. Additionally, bug fixes have been implemented, including a limit on the number of tags that can be added from the UI or API, and the Esper team is already working on exciting features for the upcoming release of DevRel 70.