I will say I very much like Redux and have used it for dumping AST nodes. I recently became interested in a project where I wanted to hack on and extend the grammar. I found this difficult in Redux, Coco (and friends), and couldn't use CoffeeScript because of lack of source map support previously.

I think a huge benefit for Redux will be making the grammar very clean and extensible. I know it's on your roadmap to CS-ify it.

Edit: Oh, and if you're curious, I wanted to play around w/ translating the CS AST to TypeScript AST, but I'd obviously need to add more typing/declaration syntax to the grammar.