A bit late, but I discovered that a workaround might exist - by using the List Item type of reference, after having inserted headings as if they were list items.
Here is how to do: First, create a document structure using a list style. Then, apply Heading styles to the list items as required. You will have a numbered set of headings, with the right auto numbering and style. Something like this:
1. Chapter 1
1.1 Para 1
1.2 Para 2
...
When referencing, you will see your headings as list items. (Shame there isn't a reference style including both text and page number in the same reference, as in the example above).
Two problems arise with this workaround: (a) you cannot edit the heading text without breaking the reference, and (b) you cannot insert lists in the text, or you will break the heading numbering. I see issue (a) also as a general problem with any other kind of reference.
In the end, the addition of a "Heading" type of reference would be warmly welcome by me
Paolo
