Disappointed I couldn't go, looked like a great time.
From a stream watcher at home - there was still definitely a lot of down time. Other than being more organized as mentioned, possibly the best solution I can think of is to have a community B stream run from home that broadcasts other games - similar to what dreamhack does. The other great thing for both the tournament and the stream that dreamhack does is list the next upcoming couple of games.
It was also hard to find the bracket link - couldn't see it in the ACL thread, or on the ACL site anywhere.
Lastly, the stream numbers went up significantly when IEM wasn't on - if possible try not to schedule on same weekend as major events, but you probably already know that.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.