I use it. Granted I'm not a daily poster, I never was on Facebook (deleted that account). I have friends and followers that will give me a + on many things. The communities are quite active actually.
If you hop on + and then do nothing, it will do nothing. If you get on and follow a few folks (think following on twitter) you'll be amazed at how much is actually posted. Join a few communities of things you enjoy, and you're page will be filled faster than you can imagine.
Some communities have hangouts / web chats. There is so much information and so much going on. Lastly, being a tighter knit community (lack of idiots and trolls) the content is better, the comments and people are better. It's currently a perfectly designed place to be for those in the know.
It's almost like we don't WANT people to know how good it actually is.
Facebook is the Walmart of the social media world. Sure everything you want is there but the quality is shit.