There are loads of reported issues to be honest, but without a proper change log its going to be hard to tell what is related to what version.
I don't suppose VAG publish their change logs!
Once I get my car I'll start to try and pull one together for forum users - but be aware that other than infotainment, the software upgrade must be done by a dealer.
From the manual, these things are over the air (OTA) upgrades:
The factory-fitted Infotainment system supports the system update function. This allows the following control units to be updated by Volkswagen AG without the need to visit a qualified workshop:
Central computer in the Infotainment system.
Control unit of the digital instrument cluster.
OCU (control unit for Volkswagen We Connect).
When I say OTA, this is either via the built in E-Sim or by whatever internet connection you have setup in your car. Like the Mk7 the Mk8 can use a wifi hotspot to connect - either your phone or other wifi (eg your house when on the drive).
The E-Sim is a 4g (3g?) mobile network connection built into the car, in the UK it uses supposedly Vodafone. If your house has a rubbish mobile signal from Vodafone (or just rubbish completely), connect it to your house wifi to do updates...