@FediThing @thoralf I agree there should be no default client but the point of Thoralf is valid.
If you don't actually and actively search for fedi.directory you don't know it exists. You would need a starter pack to have it part of the onboarding experience.
It doesn't need to be centralised. But a possibility for the instance server to shove some info in the new users face would be good. Have an automated announcement for each new user that could have a link to fedi.directory.