Wikidata could be a lot smarter than it is right now e.g. by suggesting fields to fill and probable values.
For example: when an editor edits an item about a person that is still missing the date of birth, this should be suggested as a possible property. Or when the editor is entering the sex of the person, Wikidata should be smart and suggest the ones that are used most for these properties first. Think of it as something very similar to the famous "people who bought x also bought y" systems.