One feature I think that Steemit is gonna have to expand on are the profiles or "blogs". While at the moment everything works fine, it'd be nice to see the steemit devs adding some form of integrated chat system fimilar to that of facebook's.

Heres a post I made about this idea if anyone is interested: https://steemit.com/steemit/@looking4llamas/steem-needs-a-private-messaging-feature-spread-the-word