Google+ had terrible marketing and release, but it had some decent ideas that I wish other networks had carried over. The idea of "circles", where you had a circle for "acquaintances" "friends", "family" would be great on, say, Facebook, as it would allow me to filter down my feed to just the people I really care about but still have a connection to more distance acquaintances. Currently on Facebook the news feed is…
It's the reason why I never used Google Plus. And it's the reason why when I had a facebook account I never friended coworkers or professional contacts.