Surprised to see Google + listed twice. I maintained a G+ profile for years hoping it would catch on in the US but it never did so I deleted it. Reactivated a new G+ account using the same Gmail address just yesterday and have been setting it up. Not much has changed. The app is still pretty good and it still hasn't caught in in the US.
The Discover function was a great improvement. It wasn't active when I deleted my old profile. It really helps you find active users. Many of the people and pages that I once followed are no longer active. It's really a shame since the platform and mobile apps are so much better than Facebook.It probably never will. It's human nature to follow, what most people do becomes the standard, so most people who tried it left for Facebook.
I on the other hand have never left Google +, nor do I have a Facebook account.
There are still some active communities, but some that should be active are dead, like astronomy, investing, etc.
GBoardYou are all missing the interface you use to interact with the "favourite apps" The keyboard app you use.