Comment by spazmaster

Have a look at Holacracy for interesting ways in how to structure teams and at the same time gearing up for continuous change. It's a very different approach than creating hierarchy, but it's not completely flat either.

http://www.holacracy.org/ and http://www.responsive.org/ for more interesting philosophies surrounding movements like Holacracy.

(We have a team of 10 people and are thinking about adopting Holacracy).