Feel free to add more suggestion, I will probably be adding a few more too before the update goes live.
1,
At least one facial wart (with or without hair) after Witch reaches certain level of Humors, Numens or Scalp-score.
...Witches can easily hide the huge wart with any of the mask available in the game.
2,
Pilgrims being able to seek out and approach a Witch if they dare (even if it is a crime to do so), to request, pay for, or demand that the Witch place a curse on another pilgrim's evidence/scent.
3,
At release of Witch update, maybe offer players a chance to become a noob-Witch.
...Especially since it is planned to offer all Witches the chance to repent of Witchcraft when the update is released. (Repent you pagan heathens !)