Diablo 4 is finally getting an armory to swap between builds in season 7 PTR, which is Witchcraft-themed and also bad news for Spiritborn builds
Witchcraft powers are broken down into three different "schools of Hawezar sorcery:" Eldritch, Psyche, and Growth & Decay. Blizzard also teased "rare Lost powers of Witchcraft that have since been rediscovered" and said each of the schools are designed to let you experiment with different "styles of power."