So, if someone were to post the text of the feat...
UNCANNY FORETHOUGHT
You cunningly prepare your spells for any exigency.
Prerequisites: Int 17, Spell Mastery.
Benefit: When preparing your daily allotment of spells,
you can reserve a number of spell slots equal to your Intelligence
modifier. As a standard action, you can use one of these
slots to cast a spell that you selected for the Spell Mastery feat.
The level of the slot used must be equal to or greater than the
level of the spell you intend to cast.
Alternatively, as a full-round action, you can use a
reserved slot to cast any spell that you know. The spell is
resolved as normal, but for the purpose of the spell, your
caster level is reduced by two. The level of the slot used
must be equal to or greater than the level of the spell you
intend to cast.
Would that be okay?
The thing is, I'm normally a Sorcerer man through and through. I appreciate that on the theoretical plane the Wizard is better, but whenever I've played a prepared caster - be it Wizard, Cleric, whatever - I end up banging my head against the wall because I never have the right spell memorized. So, this feat nicely solves that dilemma, and since Exemplars came out I've been itching to give a Wizard another spin.
I was mentally switching between Master Specialist and Mage of the Arcane Order for which way to go but I really want that Minor Esoterica ability, because it's cool. Besides which, a small child lugging round a spellbook is bound to look suspicious, so it's a better fit thematically than MotAO would be as a trick for when going under deep cover.