It could be interesting to be able to define a notification subscription configuration by default for a community.
This way, any new member would get this configuration when joining the community and he could change it if he prefer another config.
But this would be a great way to optimize the fact that most users would have some important subscriptions according to the community without setting them one by one by the admin.
Could it be a new feature?
Is there, meantime, a software possibility for you to "manually" force it for communities that would ask for this behaviour?