The location of the option to insert a new field is hidden on the options menu for an existing field. New fields are not always related to existing fields, and I think the new field button should be its own button on the page and not hidden away the way it currently is.
Also, if you are going to have an insert before option on an existing field, then there should also be an insert after
10 months ago
This feature has been implemented with the ability to drag and drop fields to order them