Hello everyone 
, this is Alfred from Kolaai.
All the issues mentioned here can now be achieved using the Duplicates and Uniques app.
I have put together a fairly comprehensive demo video that explains how to achieve the needed results using the app, though I would like to add that, the app can achieve way more than what is shown in the video. The video only concentrates on using the app to copy items between groups (without adding the ‘copy’ word), between boards, saving and using column templates, excluding some columns or column values when copying, etc.
The app can be found in the marketplace here and here is a community post that further describes more of the features of the app.
The demo video can be found here.
Column templates video here
Hope you find the app useful. Should you have any question, you can always contact at support@kolaai.com.
Thank you.