This doesn't feel like a question about gaming or about the system to me in that it's more a discussion of an idea, so I'm moving it to When Inspiration strikes instead. Let me know if you think it should go elsewhere.
On the actual subject, one could possibly crib from Pathfinder's Spell Perfection feat, only less hilariously absurd.
Yeah, Ask a Question didn't feel quite right to me either, but I didn't really know where it should go. Good choice, though.
What's so absurd about Spell Perfection?
1/day Sudden Metamagic any one known metamagic? It's good with persist and such, but it's just one spell at a heavy feat tax. Set the requirements high enough, and that shouldn't be a concern.
Were it to do that, and considering the feat tax, 3/day may even be appropriate... but I will hold out a bit longer for other ideas.
Off topic somewhat but to me a dissertation is undergraduate and masters and then you write a doctoral thesis...
Yeah, it seems there is some disagreement on the meaning of each term. Do you have a suggestion for a better name?
It looks like the ideas here are leaning in the direction of more metamagic providence...
What if it lowered the chosen spell's level by one for the caster (minimum 0)? That is to say... if a character took Spell Dissertation (Shout), then to them, Shout would be a 3rd level spell. The feat could also specifically state that for the adjudication of minor globe of invulnerability
and similar effects, it still counts as a 4th level spell (unless modified by other effects).