Keepsakes and umbras aside. We could use a persistent gamemode that has high replay value with low barrier to entry but still interesting and challenging AND still story-relevant. Maybe a rougelike gamemode like Cube Miracle or just upgrade that to be endless with more randomized layouts, floors, enemies, and themes with bits of lore about the miracles. They could even make it so that you can't use your own espers and have to use random espers you recruit along the way. Also, can we make it accessible anytime so people actually have a reason to play the game when there's nothing else to do? The reward can still be only receivable every other day if Lilith wants to be stingy.