It would be more accessible with the clipboard. But since that is a ‘built-in’, the opportunity to experiment with new features in that only comes once every several years … when an enhancement release of Gramps comes out.
If such a feature was refined with a beta test cycle of the Collections Clipboard, a perfected feature might be rolled into the built-in.
In some ways, the Ref objects in the various Clipboards are almost the opposite of cloning. The ‘Ref’ carries more Share context. (But that implementation seems to be half-done. It has none of the context menu features and you cannot get to the parent object.)