I'm very curious about this extension. I think it might improve adoption to describe what this extension does, and what it does not do.
For example I don't think it's designed to touch the username from talk pages. Isn't it? (I don't want t to say that I need it. Just that probably it could be useful to mention a small bullet list of things that are covered, and few well-known things that are probably not included - or that are OK to be not included)