Ask HN: Experience of having full-stack devs working on modern JS projects?

In my company there are two front-end developers and roughly thirty back-end/full-stack developers. The management believe the two front-end developers can guide the rest of the team to write proper, good quality code in an ES6, Angular 2, Webpack tech stack. The "full-stack" developers seem to have virtually no knowledge of modern libraries/best practices however.

Have any of you come across similar situations? What was your experience?