At the moment, I’m improving implementations of various unicode algorithms. I have started with the bidi package: https://github.com/servo/unicode-bidi/
What I want to do is to improve the conformance of these algorithms, as well as the performance and maintainability, as they need regular updates. Also, a top goal is to assure crate users that they can rely on the unicode version of the crates match.
If you are interested, @cbreeden, I will ping you when I have more updates on those.