This issue comes up in every serious team of professionals working with React. Javascript Developers want to be concerned with React, Redux, server, data, architecture etc... they do not want to deal with CSS, Sass, CSS modules, button hovers, transition animation etc...

Designers with some technical skills love to deal with css but not JS developers. and if they do, they do a poor job comparing to a passionate designer which is all about the look and feel.

JS developers have enough on their plate and it seems much more effective to separate the two concerns as much as possible. The best solution I've come across beside forcing your designers into React or your developers into css/sass etc is Wix React templates -

http://wix.github.io/react-templates/

What do you think about this workflow?