I think it would be nice to have something to let the players who go above and beyond to have something to flex when they get true 100% completion of the game. Meaning all capes, quests, champions, as well as the little things. Would also be nice to have some way of keeping track of progress and making sure we don't forget something.
It'll be cool grinding for Xeric's Champion, Sinhaza Shroud Tier 5. How many bounty hunter kills do you think should be required for comp cape? At least 100 and all kills should be from different accounts risking at least 1m.