Hey Scott! Thank you for your feedback. We’'ll pass your feedback along to the team for consideration.
In the meantime, I’ve switched your topic as a feature request so others in the community can vote your idea!
@Scott_Koellner what kind of preview would you expect to appear from a documentation file?
Thinking out loud here. If it’s a thumbnail of the first page, assuming there is access to GDrive, the content would be unreadable. If it’s a generic Google logo then all embeds will look the same and make it extremely difficult to distinguish one embed from another.
You can embed a Google doc on any web page using an iframe embed via the publish to web option under file > share > publish to web. I’d like something like that: just a resizable box with the document in it that lets me scroll through it. It’d be nice to just paste in a google doc or google sheets link.