Interesting! I won't promise anything, but I'll give these use cases some thought. Thanks for filling me in on this, and as always don't hesitate to reach out on the forums if you run into any trouble using the new bits and pieces!
One thing to keep in mind for parser-based IF might be to take advantage of inline images in rich text. The chat contraption pre-renders all its text snippets into inline images with IM-like borders; this would also make it possible to use color. The downside is not being able to select/copy/paste text or have working links within each image. For simpler applications you can also use inline images to provide things like the bullet points in the indices for some of my recent tutorial decks.