Yaarel made me do it!
Story-wise, I called it the "Psychic" because it's kind of part-way between the classic D&D psionicist and the modern pop-culture depiction of a person with psychic powers. I wanted to cover character concepts like Eleven, Firestarter, Jean Grey, Professor X, and the Shadow. The subclasses are meant to represent these story archetypes rather than being tied to particular abilities.
Mechanics-wise, the class is a full spellcaster because that's just easiest to balance and it seems to work. It uses spells-known but with a sharply limited spell list, built up from "disciplines" -- each psychic picks what disciplines they know, which in turn determines their spell list. The psychic can enhance their spells by spending extra spell slots when casting.
