One of the major major problems with twitch is the chatbox design. Anyone who has seen even a semi full chat room knows how useless thoes chat boxes become as text flys by faster than the speed of light. My solution would be to maybe make a tab style chatbox that many modern MMORPGS have adopted so people can have more control over what or who they want to hear from. Some kinda vip system.
Looking forward to this, cheers.