It would certainly be super interesting if communities form around the functions currently performed by Steemit, Inc. And if the layout clarifies the structure of the DAO, i.e. which community performs which function. I don't know if and how much the global culture has matured to be able to create a real DAO (most people have been taught to complain or wait for someone else to take initiative), but how exciting it would be to see large groups of people chip in a little bit to fulfill at least some of the functions Steemit, Inc. fulfills currently! I hadn't thought of this before and I take it as the major part of your suggestion, hidden behind what initially seems to be just a UI/UX idea. :P

As for the pure layout aspect, it's a bit difficult to put myself in a newcomer's shoes and see what might be intuitive (although the circular layout you sketched seems intriguing to me). But one way of arriving at a visual presentation is through something known as design sprints. This methodology could be utilized to determine the design of the front page of the steemit.com website, showcasing its ecosystem of communities.