This is an awesome product so I humbly submit this feature request. I often duplicate fields to get the same label and add a suffix or precision to field at hand.
It would be awesome if when using the duplicate button, not only the label would be duplicated but also the name. For exemple when we duplicate a field with team-member-title-en as a name, ideally it would generate a name like team-member-title-en-copy-1. Then all we have to do is modify the last bits.