Not edit from Google Docs, but have the original stored in Drive, utilizing Drive's own built-in revision history. And even have it be an "Arc Studio" filetype, that when double-clicked would open the webapp directly.

I'm just very Drive-centric, not sure what your userbase is like, but it would just feel very natural to have my screenplay files next to all my Google Docs and Sheets files where I write/track everything else for every project of mine.