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meta-
1.
a prefix appearing in loanwords from Greek, with the meanings “after,” “along with,” “beyond,” “among,” “behind,” and productive in English on the Greek model: metacarpus; metagenesis; metalinguistics.
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There is a reason why metaphysics are called by that name...
LightofAbraxas is right about how arcane research works in the game.
Meta is also used to denote 'about' or 'of' (i.e. physics about physics, or, the physics of physics).
I can see LightofAbraxas' perspective on this, though I'm not sure the game makes it clear enough. At any rate, I think the fantasy role-playing ego of most players views magic as something personal to their character and abilities, which doesn't sit right with being handed arcane research from your mundane citizens.
Regarding magic research that is not directly related to spells, spell levels, spell power, and spell books, I think a simple way to solve it would be to rename the 'Magic' tech tree to something like 'Archaeology', or 'The Mysteries' (or something better), and leave the remaining magic related non-spell techs in there (while possibly fleshing it out with more techs).