Draft? What changed?

I get a lot of drafts created in our workspace because people edit it to get a piece of code or edit because it's easier "in case" you want to change something than going through preview and then in to edit. But they don't always discard or approve their draft they created... so now my instance has a lot of drafts and I'm not sure how to tell if someone is working on it, or just edited it on a whim without making any real changes. It would be nice to have a side-by-side view of the asset (email or landing page) that would highlight what was changed in the draft. OR - if a draft is closed without any changes, could the draft disappear?

This happens less with Landing Pages since the Approve & Close button was added -- maybe that's a quick fix for emails?