Some good ideas in this post and worth thinking about. I would also add a sign in for people that doesn't include a STEEM account. For new people to post on a temporary account. Getting them used to it and maybe able to earn enough STEEM to open a full account that can transact. 3speak have gone with this approach and it might let people open an account instantly and get used to the platform before going deeper.

I also have steemplus and like all the extras it adds.