following people & your progress
It's a great feature to follow other people and see your own progress.
It would be nice if there were a statistics of translation quality over time.
I agree. Unfortunately, the 'activity stream' gets cluttered up with unnecessary information 'x did a practice lesson, y translated a sentence' very soon. It would be great if there were an option to control which infos you want / don't want in your stream. But I guess, this will be implemented sooner or later.