[Occults] What do you think the powers and weaknesses would be for

They do sometimes consider past packs when making new ones, like how Get Famous added fame options to the already existing careers, the list of club activities from Get Together keeps getting longer with every new pack, and I think the insect repellents from Outdoor Retreat also work with Jungle Adventure. So it's not out of the question that a future pack featuring witches might bring back cat familiars, and I hope it will.