Personally I didn't even check what the FB link was since it was clearly a link to a Facebook album. For anyone interested in data munching, a graphic is worthless, you need the numbers. And more data, always
Not sure what you expect them to publish beyond MAUs and DAUs by region. Those are pretty standard ways to measure engagement and if I were Facebook I'd be loathe to publish more granular data just to "quiet the critics".
(Oh, you don't have metrics to prove that? Is that because users are jumping ship?)