I absolutely love the direction they are taking with the past two updates/season two, but I think there is more they could do to broaden the appeal.
Specifically, I would love to see implementation of a hard mode into the personal story line – with some kind of minimal rewards (could be as small as a champ box) for repeating each episodes final boss (Aerin and the Monstrous Mordrem Thrasher so far). Adding hard mode to unlocked personal stories could create short mini dungeon experiences with fights that challenge groups up to five players – hopefully not replacing dungeons but definitely giving groups something fun to do in between dungeon releases – of just a way to really quickly have some fun with smaller groups.
Just a thought.