Great article very insightful. What i think would increase Steemit stickiness and make it more a social network is the adoption of common features of Social media sites,
Like the ability to build an audience,that is having a public feed for all post and a personal feed that just shows you posts from people and categories you are interested in. A private messaging system to send messages to friends, and the ability to form groups. I think that this will dramatically increase the visibility of posts that get lost in the feed, and that faces greater competition everyday as our user base grows.