The best part about this league/site is the people involved, but that's a bit of a cop-out answer, so I'll pick something else. The live events are very interesting. They don't always go according to plan, but still are fun to witness. 
Things I would change around the site would be the clique-ness of many of the positions and groups. Not sure exactly how to do it, but while I feel like the league as a whole is very welcoming to new people, jobs and other roles are a very "you have to know someone" situation.