I see a lot more traffic on Facebook since people have left here for there. I find that a bit sad. Yet, I am on it, too. I think I understand the draw of Twitter (some place I will NEVER be on). Facebook makes it easy to dispense short blurbs, whereas LiveJournal is more rich in its handling of lengthy posts. LiveJournal is more oriented to serious blogging than just casual updates to friends and family. Perhaps that is why it is not getting the love it deserves. I see people trying make lengthy posts in FaceBook and in Google+ and they are a HORRIBLE medium for that.
Nothing prevents people from using LiveJournal for casual updates. One of the features that differentiates LJ from FB and G+ is that of "likes". There is no way to rank the popularity of a post within LiveJournal. People's vanity is harder to serve on LJ.
Vanity is a big selling point.
But, as a "real" blog, does LJ even need or want that?