I think it would be cool if we could see the progress of friends on lists they have made (or maybe any list). For instance, I created a list and my friend wants to see what my progress is, but she can only see what she’s watched and can only tell what I’ve watched if she goes into the specific shows/movies.
Along with other suggestions I’ve seen for being able to share lists and have multiple people add to them, I think this would increase the social aspect of trakt!