Getting values for filterable profile fields

I'm consolidating my requests here: Quirks, bugs and improvement requests for the JS and REST APIs

Using the current JS v3 API.

When I am using the osapi.jive.corev3.people.get function I can pass in a number of filters such as department, location, etc. Very similar to the browse->people view in the Jive UI.

Using the osapi.jive.corev3.people.getFilterableFields() method I can get a list of fields that can be filtered.

So far so good. My issue is: how do I get the list of valid options for the filters? The filters are case sensitive and must be entered correctly (the people browser in Jive uses a dropdown).

I thought the metadata endpoint would give me this data maybe with the field metadata, but the filterable fields do not show up there.

Any pointers?