Have you ever wanted your witch's bloodline to have a more tangible effect? Earning more XP is great but not very noticeable. Overload protection is awesome, but a wise witch wouldn't get close to overloading in the first place (Curse of Uncontrollable Charge notwithstanding).

Have you always wanted a Sim that doesn't need as much micromanaging? Perhaps you have multiple sims and need to concentrate on a select few or one.