For a workflow with a central OpenPGP CA it is important that the CA can revoke its certifications. Kleopatra currently offers no GUI for that. Mostly because it is difficult to do as it would need card-edit and an editinteractor. Which were always a cause of unstableness. So the parent tast of this is to have --quick-revsig added to GnuPG.
In Kleopatra I think this should be shown as a right click option on a signature made by the own key in the "Certifications" Dialog.