These new 'schools' remind me strongly of the magical colleges in the DSA rpg. If there are any similarities these 'schools' will more closely resemble the psionic disciplines than the 3E schools, i.e. the majority of spells is available to everyone but to get 'specialist' spells you have to be a member/visit the associated college.
If my guess is correct it would also mean that you could create an endless number of new 'schools' that have a different mix of 'specialist' spells.
If my guess is correct it would also mean that you could create an endless number of new 'schools' that have a different mix of 'specialist' spells.