PANORAMA
– Panorama UI is now enabled by default on all platforms.
– Users who experience technical issues running CS:GO Panorama UI are encouraged to email CSGOTeamFeedback [at] valvesoftware.com and include #PanoramaUI in the subject line.
– Legacy Scaleform UI can be used for a very limited time with “-legacyscaleformui” launch option.
MP5-SD
– Slight increase in maximum audible distance of primary fire sound.
– Chickens are no longer scared when players fire the MP5-SD.
MISC
– playgamesound command is now cheat protected.
Source: http://blog.counter-strike.net/index.php/2018/08/20877/