Looks nice! I believe the Webpack sass-loader depends on node-sass instead of the ruby version. Have you found any issues because of that? I remember taking a look at node-sass a couple years ago, and it wasn't up to par with Ruby Sass in terms of functionality and caveats.
I've been meaning to look into Flux as well, seems like an interesting design pattern for large applications.
It's at the point where I can use node-sass and Ruby Sass interchangeably for our (very large) Sass code base at my company, but we also don't rely very heavily on the newest features. Worth a try, anyway.
I've been meaning to look into Flux as well, seems like an interesting design pattern for large applications.