That's a lot in the context of our teeny hobby, but it's pretty much nothing outside it.
And, the classic D&D wizard isn't just 'magic from books,' it's Vancian.
I’m not talking about mechanics right now, I’m talking about thematic. The thematic of a scholarly wizard already went beyond the realm of table-top RPGs. Just look at video-games, or fantasy novels (like the last one I read). D&D’s influence went far beyond table-top RPG lands, and D&D was not the only beginning point.
I love the Vancian (Slot) system, though, but that's not the discussion.
OTOH, the idea of supernatural power from ancient, occult /arcane/ knowledge is classic, and was a big deal just a few centuries ago. The hermetic tradition, as revealed by Crowley and other, dosed with Theosophy, science, and pop culture, is where the modern concept of the pointy-hatted, bookish wizard comes from, be it those of Vance's sci-fi classic or Tolkien's high fantasy, or Rowling's post-modern inanity.
Yeah, thank you for agreeing with me ^^
Limitting the bookish wizard in a practical sense is easy: rituals, only.
It was stretching to make it playable in combat that led EGG to the Vancian system..
Hahahahahahahaha well, that’s possible. I do have my doubts about people who want combat-ready wizards, but it would be something similar to the 2e Sha’ir, I guess. However, I was kind of telling him the wizard’s area of magic doesn’t need to be everything.
I discussed that above. Because 'arcane knowledge' isn't really thematically a source of power, and anything might come of knowing obscure things or whatever, the thematic focus granted by the arcane power source is basically nil. The consequence being exactly what happened with the 4e wizard, it 'ate' many other classes, thematically expanding into their roles and thematic space. Thus you got wizards virtually replacing sorcerers, invokers, etc and expanding to fill many areas like necromancy, illusion, summoning, etc with one 'uber' class. Notice that some other classes actually 'fled' to other power sources in order to continue to exist in some form (the Elementalist being the prime example).
Other power sources in 4e were much more coherent and thematic. The elemental source, the shadow source, and the primal source, and the most focused being the psionic source (monk aside, which is IMHO psionic in name only). Even the divine source, which could potentially be its own thematic monstrosity, managed to be contained within a limited design space (albeit one might say that the arcane was the vehicle for that confinement).
In my game we have the Spirit, Elemental, Life, Shadow, and Martial power sources. These are fairly abstract, but you can actually say that your character is gaining power from SOMETHING. My warlock is a Spirit source class, he's drawing his power from a pact with some sort of higher/lower being. My sorcerer is Elemental, he's drawing power from the forces of raw creation. Druids are drawing from the power of life, illusionists from shadow, and monks from Martial -the power of your own person. It serves the original purpose, thematically confining each class and giving it a thematic core to draw from. Sorcerers don't cloud their targets minds, call on deals made with spirit beings, heal, or rely heavily on expertise gained through constant physical prowess; they unleash and harness elemental forces to create and destroy.
The system you are using makes sense, but I see absolutely no reason one cannot say, “Knowledge gives you only these effects” or “These effects cannot be gained by any other method beyond X”. Honestly, I’ve always thought that some effects were more “arcane” than others. I mean, some complex effects could be the “arcane” stuff in opposite to simple effects as fireballs and lightning bolts.
Of course, if you are making this system only for yourself, there’s no point in trying to convince you to add anything. However, I’m talking from my hypothetical point of view as a player who will play this game or whatever. The lack of a “bookish” caster would be a negative in my records. It’s not a deal-breaker, but I don’t have those, anyway

Edit: What I’m trying to say to you here is that Arcane Magic doesn’t need to be this huge thing it is in D&D and some other games, encompassing so many effects and having so much versatility. To make power sources smaller or more focused would demand this from the arcane power source. But that doesn’t mean one should exclude arcane study as a power source.
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