The sorting features it's a bit weak. Shortly speaking, I have to set the sorting of my characters in every single dungeon, world, and level again and again and on and on. Many of us have lots of characters or strive to collect them all and, when we are in need of a particular character to fulfill a certain achievement or a mission, an endless and chaotic list is quite time consuming and frustrating. I think that setting it once as we deem fit and then "locking" the sorting system throughout the whole game would be quite useful and time saving for many players.