Battle Rank Achievements?

Would it be at all possible to get battle rank events added into the list of achievements? Or at least the last BR earned (but if it's possible to get all 100 of them, that would be fantastic).

Currently, the achievements only appear to include medals (though it looks like it's also setup to possibly include ribbons at some point?), the list of events doesn't go back very far, and the historical stats (which includes the number of battle ranks earned) only goes back one year, so if someone has earned BR 100 more than a year ago, there is no way to even get an approximate date of when that happened.