This may have already been brought up, but my google searches did not find anything on the matter. I propose a history log for every character. It would be a window that shows how many times you've completed certain missions, your win/loss record in LD, your total crowns gained over your entire character's career, and how many arcade levels you've completed.
People with the greatest numbers/records in these categories for the week/month/entiretyofspiralknights could get their names displayed on some board in haven (I've heard people mention the idea of displaying level leaders before, and thought this idea would pair nicely with it).
Questions, comments, concerns?
I agree. Also if the Event Hub shows us when friends or guildmates complete achievements, why can't we see it when we inspect them?