Others have made great suggestions so far. One that I would like to see is the ability to have 'groups' similar to reddit, so people can form mini-communities within Steemit. That will enable people to stand out within these mini-communities much more, whereas now we're all 'shouting' in the 'New' section trying to get through. I know you can search all posts per tag, but it just doesn't seem to do much community building in it's current form.