Why can't magic be split up? People keep saying that there are too many, but are there really too many useful search parameters in there? Damaging, debuffing, buffing, healing, and transportation covers almost everything I can think of that someone might legitimately want to search for use in RP scenarios that aren't better covered by interests. Or, potentially more atomic things could be interests and it'd do away with a too-vague category altogether. Or all of the above. But as it is, it's too vague to be useful unless you specifically want to avoid any type of possibility of magic ever, anywhere. So yay for you and people like you, I suppose. People like me still can't tell a good wizard from a good healer, or an evil mage from an evil healer.
There's loads of other ways to dice it up as well: Elementalism (and then more specifically Pyromancer and so on for specific elements), Bending (as in Avatar, and its specific elements, depicted far differently to regular fantasy elemental magic), Necromancy, Divining / Seeing, Illusionism or Mesmerism, Summoning, Conjuring, Potion-making, Alchemy, Dark/Light/Red/Blue/Green Wizardry (from Final Fantasy), Druidism or Shamanism, Divine/Cleric/Paladin/whatever, Lovecraftian magic, Witch Doctor stuff. Then you get the less explicit general magical hoohah that Gandalf, Saruman, and the Elves do, and that the wizards and witches of Ghibli get up to.
The slices you chose seem to be pretty sensible in a game context where you pick one of those roles, but these fit narrative contexts. These have overlap because different lore is slicing things up differently, and some of these names mean different things in different lores — Necromancy has all the healing and resurrection spells in AD&D and D&D 5e, that's the healing magic!
We also need multiselect to make sense of this. A prototypical Cleric or White Mage would have to pick between buffing and healing in your paradigm. If we go with the stuff above, the Lovecraftian alchemist & illusionist misses out on people looking out for the one of those three things they didn't pick.
People mentioned things like illusions and teleportation and transmutation and blah blah blah, niche niche niche, but most of those things should be interests, not traits or categories. That's where things that specifically actionable go, after all. Maybe all of that particular category is better off under interests and shouldn't be a trait or category at all?
(...) I am really not familiar with borderlands, but afaik, a technomancer was someone with magical control over technology. Or the use of technology so advanced that it seems like magic. So I guess it depends on which one any particular character falls under. Still, the former is the use of magic to control tech. The latter is the use of technology. Both are interests, both are actionable things.
Sure! Maybe we should express brands of magic in interests.
It's the same with technological. Someone interested in gun battles or hacking isn't necessarily interested in mechs and powersuits, but all those are thrown together in a category when they're specific items or actions that fit the bill for belonging in the interest list. Being a cyborg or robot is a far cry different from using an exo-skeleton.
That's pretty fair.