Android v9 Changelog (non exhaustive list):

• Improvements to double buffer: Fix graphics in games like J-Star victory, Gravity Rush...
• Overlay joystick improvements: You can now run diagonally
• Touchscreen fixes: Fix regressions and touchscreen issues
• Overlay improvements: Should use a lot less GPU power
• Overlay: The overlay button size can now be modified
• App pausing: Re-enabled and no longer freezes the application
• Fix gxm alignment issues: Fix regressions in Tokyo Xanadu, Trails of Cold Steel 2
• Texture replacement support: Support png, uncompressed textures, BCn compressed textures (Snapdragon only), ASTC compressed textures (any phone). Textures have to be manually places in /Android/data/org.vita3k.emulator/files/textures/import/game_id

PC Rebase:

• Kitakata/Zangetsu: Add Indonesian and Malaysian languages
• ExtremeExploit: Use curl for http request, should fix issues preventing the compatibility database to be updated
• redpolline: Refractor the filesystem architecture (not relevant for Android but still a lot of work)
• Macdu: Improvements and fixes to the ngs player, fix the Audio in Borderlands 2, Mickey Power of 2, Valhalla Knights 3
• Macdu: Fix ingame dialogs freezing the emulator under certain circumstances
• Macdu: Plenty of shader fixes, fixes the graphics of Hyperdimension Neptunia, FIFA and Borderlands 2 (require shader cleanup)
• Macdu: Improve ngs support of mono voices, fixes AoT game audio
• Macdu: Properly initialize gxm texture objects, fixes cutscenes in GoW
• Macdu: Rewrite the surface and texture cache, performance improvements and needed for texture replacement
• Macdu: Vulkan refractor, fixes chaos ring and improve performance for driver with bad memory allocators