If you look at Linkedin, Twitter and Google+ you don't find the same features that are available with Facebook.
What I think has kept the social network so attached to our psyches is the same psychological principle as to why the Japanese love romanticizing high school in anime over and over again. Facebook was created as a utility to connect together alumni within a university. It plays on our tribalism and need for cliques.
Just like this post mentions it also is moving towards more visual feedback. The sensationalist adds, the lude pictures and facebook videos aren't enough. There must be more sensory feedback even if it requires a VR headset to get it.
Take the example of the IRC chat. There are no avatars and the names are user created. Just like with radio in contrast to television you get less stimulation. It doesn't engorge the senses.
I don't know the current state of things with Facebook as of right now, but I think at some point there is going to be a movement that begins to build and build and it will come from a deep revilement for the sensationalized news, the abundance of ads, the platform that promotes arguing, the too-slick ease of doing virtually everything in a virtual format. At the core of it is the fact that long ago people sought to break away from illusory things. Think Buddhism and Gnosticism. Now, instead, we are willingly and eagerly enshrouding ourselves in something that looks glossier and more fabulous than real life and it seems like we've forgotten to remember the signs along the road in case we want to turn back.
Why is this being hidden? A magazine about economics that has been in circulation for over 200 years and is owned by the Rothschild family. How could this be somehow unrelevant.