So I have a question about the know and change classes , so if they can manipulate there aspects ( to varying degrees and methods ) than can’t they basically do things like subtract it from people or make people have more , like a prince and maid ?

The difference here is Versatility vs Impact- As ‘Know and Change’, generally speaking? Yeah, you could say, for example, that Jade, the Witch of Space, can shrink someone and consider that ‘taking Space away’ from someone, which then a Rogue or Thief of Space could also potentially do- But while they’re more versatile and able to do more stuff, the sheer strength behind the Destroy and Make Classes make them more intense in their effect. Feferi, the Witch of Life, could heal the Mayor’s grave wounds, but Jane, the Maid of Life, can straight-up resurrect herself and other people.