The ability to click on any component and select “Copy to Clipboard”. This would copy the XML to the Clipboard Component that can be dragged on the page just like any other component.
We are definitely planning to have Copy and Paste capabilities in the Page Composer - no release targeted yet, but this is on our roadmap.
And how about this. Have it such that you can preview the component, tweak it’s setting and save as a template with a name. I could have used this countless times when making a tree structured drawer system.