The subtlety rogue artifact scenario “Fangs of the devourer” requires you at some point to Pick Pocket a demon, however you don’t get Pick Pocket until level 24 and you can start this scenario at level 10 as soon as you get to Legion Dalaran. This breaks the experience for a Subtlety Rogue who wants to level up using the Timewalking campaign on the broken shore since you cannot get your artifact weapon.