Perhaps if there was a way to keep the general idea/most of the school names but make them all consistent...
The most important "sectors" of D&D spells, are Mind, Life, Matter.
Mind can be called "enchantment". Life called "primal", including animals. And Matter − namely the elements − can be called "transmutation". (Think of transmuting lead to gold, but transmuting applies equally to the shaping or transforming of any element: earth, water, air, fire, and also plant as a kind of element.)
Each of these sectors has a spiritual aspect. Mind has prescience and outofbody projection, which I associate also with teleportation, spacetime, and fate, all of which can be called "divination". Life has resurrection and healing, which I feel deserves its own school, but might be called "abjuration". And Matter has ethereal force relating to ether, gravity, telekinesis, flight, force energy and force constructs, which might be called "evocation".
So.
Mind spells subdivide: divination, enchantment, illusion.
Life spells subdivide: abjuration (healing), primal (shapeshifting).
Matter spells subdivide: evocation (ether force), transmutation (earth, water, air, fire, plant).
Note, "necromancy" broadly includes the darkside of each sector. Mind: fear, insanity, amnesia, nightmare scapes with aberrations and fiends. Life: undead. Matter: , shadowstuff.
It seems possible to repurpose the traditional names to create useful categories that are consistently both means and themes.