I think -- at least in Divided Loyalties -- Humans and High Elves just...
do magic different.
High Magic, Qhaysh, should not be seen as the "Obvious, red carpet rolled out, endgoal" for Human magic achievements/endeavors/goals.
Because the height of human magics is achieved in a singular wind.
People are tunnel-visioned on it, but... "How get High Magic?" "You can't, and, evidence seem to hint or imply that, perhaps, you
shouldn't even..." "Okay but how High Magic tho?"
Do you want to achieve god-like heights of magic, and achieve world-striding feats of magic? Well, buckle up and prepare for
having to do it while being a mono-Wind spellcaster.
Because. Human magic, human spellcasting...
is doing magic in such a way that it attunes, aligns, and transmutates, your soul into that Aspect or Facet of the Aethyr.
Even if you
could do High Magic somehow, well... Let me use an example or metaphor.
It would be like a human thinking that the heights of magic any human should reach and strive for is to... become a Runesmith like the Dwarfs.
The trouble is, even if you managed it, it would only be good for a flex and to make people's eyes pop out of their heads. Yeah, sure, you become a Journeyman or Master Runesmith. That's great. No human has ever done that before. People didn't think it was even possible, for a variety of cultural, racial, metaphysical, and divine, reasons. ... Unfortunately, you're, kind of... Still not objectively amazing by Runesmith standards? Also, this still doesn't make you the best
human spellcaster. It makes you the best human-who-uses-Dwarf-magic-spellcaster.
It's a notable deed, sure. But you haven't reached the heights of human achievements. You've just, weirdly and amusingly, decided to go off on a tangent and flex over two whole races (humand and dwarfs both).
So anyway, what I'm saying is...
High Magic is not required for world-changing feats, or "Playing around at the 'real high end' and 'actually mattering'
on a setting level." It is not, in fact, the thing that you Have To reach in order to Really be Actually Relevant(TM).
Fundamentally, it seems to me, like, human magic in Divided Loyalties is about transforming and aligning the soul.
BoneyM told us that
humans have Spell Masteries, and that
Elfs don't.
I think that that is a very big clue in 'what' magic is 'like' in this quest's canon.
So, temper your expectations accordingly. And temper your
ambitions and goals accordingly.
... It also neatly explains why Teclis taught and arranged the Colleges the way that he did; because humans align themselves to a facet of the Aethyr. So he had a choice of either getting the humans to align themselves to a single Wind, or getting them to align themselves to some kind of singular Lore of Sigmar (the Chief Deity of the Empire) the way there's a Lore of the Widow or a Lore of Nehekhara.
He could have tried to pull together a ton of Divine Spellcasting traditions, and get the humans to align their souls to those divinities. Or he could have tried to suddenly crash-create, from scratch, a "Lore of the Empire" and to pidgeon-hole every Wizard into being locked into that Lore.
He didn't -- couldn't -- have done that. He didn't have the power to scratch-create a single Lore to meet the whole needs of the Empire, to meet the cultural acceptance of the Empire, and all the other things and etc etc.
Instead, he decided to gift humanity with
breadth and with advanced knowledge.
He gave humanity the 8 Winds of Magic because of a combination of many Standing-on-the-shoulders-of-Giants factors; the factor of having all the requisite knowledge from Ulthuan; the factor of having several native traditions in the Empire that already more or less held to a single wind; and the fact that this way, he could give
a ton of width to the Empire's newly-organized magic traditions.
The Colleges, and the 8 Orders, were, indeed, a gift of Teclis. Sheer strategic breadth and flexibility of 8 Winds. Bolstered by millennia of Ulthuan's own knowledge.
And if he couldn't figure out a way to make Elementalism work, that's because
he couldn't figure out a way to make Elementalism work.
Where was he supposed to pull the 10 millennia of Ancient
Egyptian Ulthuani Elementalism knowledge from? His ass? The Archmages of the Tower of Hoeth probably did Elementalism by using Cardinal winds or using High Magic; the heck was he supposed to do to transpose that to humanity? "Just do it like we do; by learning multiple Winds first"? It wouldn't work for a human, because it would drive them insane, or take too long. So, he doesn't have the Ancient Ulthuani Elementalist knowledge. He'd have to rely on the native traditions. And those don't have
enough knowledge. Not enough for him to really revolutionize and boost-from-'cottage industry equivalent' that the Empire's magics were before.
Do the Colleges of Magic miss out on some things that human magic can do? Yes, because humans can also do divine magic, and can do Lores of Magic. But Teclics didn't not have an infinite amount of Lores of Magic to share; only 8.
Here's the thing, though...
He grins unrepentantly. "It's hoped that I'll have an opportunity to see the Ice Witch in action. Weather is part of Azyr, but it's underutilized compared to our study of the future and the stars. We're not looking to steal secrets, just to garner a bit of inspiration. It's unlikely any of the inner workings would be directly transferrable, anyway."
"Not quite Arcane, not quite Divine," you say with a nod.
"Closer to Elementalists than anything else, if I had to guess."
... The Colleges of Magic are researching heavily into the Mystical facet of the Winds of Magic.
And the Elementalist facet, too.
And they're developing and unlocking Masteries, too. The unique and personal flairs to magic use that humans have.
So.
Even as sort-of-pidgeonholed as the Colleges of Magic were, by necessity and shortness of time and so on... ... Even then, humans were not going to be content to remain in the starter area. Heck, it wouldn't even have really been possible forcefully keep them so; because humans would have pushed the envelope of what 8 Winds Magic can do
just by practicing 8 Winds Magic. Because of the spell masteries, and the transformation and alignment of their souls with the Wind.