Allow to replicate the configuration from the editor
Replication from the CA editor would be very useful
Showing the replication state (replicated yes/no - perhaps through icons)
Show last replication date and perhaps if there were modifications since last replication
yes, the "publish this page" button is already implemented, see
showing replication state and last replication date is not trivial - as the publish date of the configuration editor page itself is not interesting, but those of the configuration pages below /conf - and there might be more than one for the current configuration context, and in mixed publication state.
With the implementation of https://wcm-io.atlassian.net/browse/WCON-38 there should be a button now to replicate which works fine for me.
Regarding exposing the configuration metadata: That would definitely be nice to have.