Something I've noticed that's lacking in terms of Marketo's teamwork functionality is the ability to easily track when an email is updated and by who. Campaigns show you "Last Modified" with date, time, and user.
I tend to keep drafts to a minimum so everything is current, and when a random draft appears, it'd be nice to see who created and when in order to follow up and account for everything.
Would others find "Last Modified" info for emails (similar to campaigns) helpful? I'd imagine this would be easy to implement.