I honestly thought +1 not appearing in the stream was a feature. A feature I liked. After all if they want to share it they can share it. It's the same thing about games not appearing in the stream -- I honestly don't give two shakes if you need two more friends to visit your farm in order to get the golden shovel, I'm not interested. I like how it's segregated to it's own tab, IMO the only improvement they could make is adding an option to toggle whether you see your friend's +1s and game 'trophies' in the stream or not.