abirdcall
(she/her)
I'm usually one for thinking familiarity and tradition aren't awful reasons for keeping something (as long as it doesn't hurt others!). But is there any reason to keep these particular eight schools besides tradition, and are there any folks who are super-fans of the current division who would be upset if they were merged a bit? I can imagine illusionist having historical momentum, any others?
The schools work the best when they have oppositional schools.
The wizard has such a huge spell list it would be fine to limit it by restricting the oppositional schools. That would add complexity though and people don't like feeling like something was taken away even though it is fine for other classes to have much smaller lists.
I would be happy if the wizard got more powers with their subclass at the expense of opposed schools.