Allow users to toggle between gained at / total XP and a plain XP value on each ability. On classes, including a counter that keeps track of totals by type (passive, combat, and narrative). Save these interface preferences to local storage.
Also allow users to delete more than one ability at a time. The interface will need to make it clear that not only the selected ability is deleted, so a simple "X" is probably insufficient.
Force users to select at least one filter if more than 30 abilities would display without them.