glaring dance move ommission!

System

Forgive me if this has been reported before, but how come we have a bunch of dance emotes, all of those animations being from the 20th and very early 21st century? Why don't we have a much more recent dance move, the very awesome Ferengi dance (as seen in DS9 episode: "You Are Cordially Invited"): http://www.youtube.com/watch?v=hL6AgaUkwBA (not the best quality but you should just see it in the episode).