Didn't you know that this is the network where lots of improvements are promised but only very few get ever implemented....? Didn't you know the best paid blog posts were big announcements, independently if the things announced got ever done? :-D

You better don't ask about timelines, because even if there was one it wouldn't be fulfilled.
The community feature - also known as Hivemind - was planned to be implemented in Q3/2017 btw, the Steem app for mobile phones was supposed to be live in December 2017... Should I go ahead? :-))

I guess HF20 should be ready by 2020...