Paul wrote:

at least the method removed a half-present CandyCrushSoda item that I
couldn't get rid of otherwise.

Having got rid of it, and before syspreping, would it be worth slipping in

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Win dows\CloudContent]
"DisableWindowsConsumerFeatures"=dword:0000000 1

to prevent candy crush and similar from getting forced back later?