I used to be an editor for Codex which is pretty huge on Medium. I humbly bowed out after a few months because there is just not enough time in a day to be an editor. Especially not for free. I used to be a site admin and forum moderator back in the day and I got paid for that. Not a lot, but it was money, and even that site had better tools than Medium. Now, of course, I've said this before, Medium is a small company at the end of the day, but Tony will have to start pouring resources into this stuff. It's the kind of stuff that eventually can make or break a publishing company.