The feed functionality is already a few days old. As far as I am concerned it made a difference in keeping track of like minded peoples' content or just interesting authors and/or curators. I hope it will be possible in the future to allow creating feeds of either users, or hashtags or both.
Now I would propose to extend the share functionality so that a user may decide instead of the existing options to promote an article by "pushing" it in his feed, so others may read it. This functionality will provide visibility to a wider readership, potentially allowing for more votes, but also an alternative way of promoting content. It would also allow like minded groups of people to further interact on issues they find interesting to elaborate on.