Does anyone have an official changelog?
Here's what I pulled from Android Authority and they claim it's a full changelog.
Improved user interface: The latest version of Android includes enhancements such as re-styled status and navigation bars, a new full-screen-immersive mode, color emoji support, improved closed captioning support, stronger security and smarter power use.
Default messaging app: Choose a default messaging app when multiple messaging services are installed.
Improved GPS performance
Enhanced music access: Full screen album art and media controls are available from the lock screen when listening to music.
Camera access: The camera can also be accessed directly from the lock screen.
Location menu: An integrated location menu enables users to easily activate GPS and share location details.
Wireless printing: Integrated support for wireless printing available in enhanced settings.
New sound controls: Set sound for specific Samsung applications in enhanced settings.