i suggested this in the survivor companion thread a bit back but more relevant to this discussion
The Specialist: further reduces capacity for learning/casting from banned spell schools than standard in exchange for bonuses to learning/casting from a specific school(s).
The Generalist: removes limitations for learning banned schools in exchange for mid-tier access across the board.
The Librarian: reduced number of spell slots in exchange for extra knowledge proficiencies and bonuses to knowledge checks.
The Researcher: low number of spells inherently known but reduced costs to transcribing new spells and creating spell scrolls.
The Pioneer: limited access to metamagics and/or divine/primal magics.
The Battlemage: focus on combat magics, armour proficiencies and war casting.
The Supporter: limited combat magics learnt but large number and access to utility, ritual and support spells.
The Quadratic: all of the above.