on several different projects which we have been handling for our clients we have noticed that the functionality for an editor to be able to copy a page contents and structure is not available any longer. Have this feature been removed?
Are you talking about the ability to copy content from one locale (language) to another? If so, that is still there, but only when you add a new locale to a record. The per-field copy feature was removed because it was rarely used, but if you add a new locale, it should ask you if you want to copy the contents from another one. Does that help at all?
If thats the case, I updated the plugin above Locale Duplicate - Plugins — DatoCMS and now you can add that to the fields you chose in your configuration