Ive started with React recently and strangely the lack of fragments were one of the things that caught my attention in the first days.
Another thing I'm looking for in React as I get started is better styling support. I'm resourcing to React JSS for that, but I feel it should be part of the language. The web trinity if you may is HTML-CSS-JS and React basically left CSS out half-baked into almost unusable style attributes, so I still have to resource to className and CSS. Or am I just being noob-anal?
I've found styled components to be a nice attempt at bundling styles with the component. Haven't tried that many options though.
It has out of the box support in Atom and scss (like?) syntax.