Hey Sean!
You are in the correct place, the Features category is the place where you can share all your feedback/feature ideas !!
Your suggestion is really cool, I'd would be a great thing to have for Content relationship fields.
Something you can use to have more detailed organization inside your documents and be able to filter them so finding them later it's easier is to use the Default tagging system. This wouldn't solve the fact that you still have to manually exit one document to go look for the linked one, but it gives you more granularity at the moment of searching that doc.
I'm going to add your leave this thread as an open feature request. And if/when we have any news about it well communicate them in here.
Thanks!