Why not? Is it hard to understand, or just not to your taste for some reason? Or is it mechanically weak?
The BAB prereq can be met by a Wizard 6, the skills are easy (take 2 knowledge skills and a few ranks in all the social skills and you're pretty much there) and Alertness even comes free for people with Familiars !
If it's flavor, then... Yeah. I made this class to fit the "I'm damn good at what I do, and I use it for spycraft" theme. If our Inquisition personnel don't have these skills, then why do we keep them around? Bruisers should go straight to the army
We want James Bond, not Thog the Barbarian!
Otherwise, have some more PrC suggestions:
- Stay a plain wizard. Why not? Every five levels you can get Spontaneous Divination or a domain ability. That's already better than most PrCs. And the world needs people with no PrCs!
- Loredelver. She'd have to take a Rogue/Beguiler/Spellthief/Factotum level and mechanically this would not be very powerful (losing 2 caster levels sucks) but the skills are amazing for an Inquisition agent and the Loredelver's class abilities are then quite good.
- Divine Oracle. It's accessible to arcane spellcasters, and it's quite good.