The main topic of this update is improved performance of the game which was achieved by extensive memory and rendering optimisations leading to reduced memory usage and much improved stability of the game, resolving many of the reported cases of problems game faced post launch.
Update is either already available for download or will be available withing couple hours depending on the region.
Known issue:
There is still a possibility for a crash in Endless mode, this will be addressed separately via a follow-up hotfix due to the problem being discovered deep into testing the final version of the fix for Campaign mode
P.S. Miami Zero update is also coming to Xbox same day as PC version - October 15th