Alternative spheres are touching upon the topic, but very very lightly. Pillars, based on second-hand accounts, seem like a more serious step in the right direction.
But I'm talking about paradigms that involve radically different architectures of magic. E.g. imagine Akashics who don't have the favoured sphere of Mind because their architecture isn't sphere based, but rather based on Chinese Elements, and thus instead Akashics master Elemental Powers, they factor in elemental synergies and rock-paper-scissors, they talk about Disciples of Wood who can perform Wood-element Effects from all nine spheres but can barely perform any of the basics of other Elements. But from what I've read and skimmed, paradigmal architectures don't go so far afield from the default. It's something that I keep hearing from fans (overwhelmingly from fans on this server and barely ever elsewhere, e.g. I never heard this idea from ones from my city), but not so much from canon. The parts of canon I read seem to paint a much more uniform picture where the justifications vary but the architectural 'laws of supernature' are in fact the same no matter what you believe and what you call them, unlike the laws of regular nature.