It would be cool if it would add some more context to what twitch already does. I.e. develop a plugin to support markdown in the chat so you can interact with your viewers and share snippets easily (just an example of a useful feature) or if you really wanna help education of coders some kind of plugin for sublime/vscode where twitch viewers can request to explain a certain line on the screen, kinda like a real time poll where you vote the next line of code you want explained?(again another example of useful addon for live coders that do edu coding streams)