I think that this is the type of thing that needs to be just done. If enough people do it, there will be some who make it to the mainstream by fine tuning it or adding other layers to it. Overall, it's probably not a success overnight idea, but it could lead to good results much later down the line.
Also, another idea to consider is coaching sessions/chatting. Like, as an experienced writer, you offer to give coaching to new ones. And in the downtime, you either chat with your viewers or play a game or something. I think this might work better than just a flat out writing stream.