I wasn't sure how to formulate this: when we right-click on the launchers, the only options we have is the list of opened windows, "Open a new window" and "remove from / add to favorites". There are plenty of options that should be present there, like "compose new message", "contacts" for mail clients, "open new private window" for browsers, etc. These are actually already set in the application launchers. If we open menulibre we can see them in the Actions tabs. Gnome-shell fails to render those actions in the launcher. UI would be improved by doing so. Unity and KDE already offer this.