Basically the title. It would be nice to be able to stay up to date with the latest bundle of extensions that Manjaro includes in the GNOME flavour, while still being able to customise the gdm theme.
Extending this logic, all theme customisation packages should be optional dependencies of
manjaro-gnome-assets - and would therefore make the package pretty pointless.
The entire point of the package is to maintain the Manjaro theming.
You can quite easily install the other packages and exclude