Well, they'd keep the Aspect-based corruption from their law-breaking. But I don't see much point in docking their Refresh.
Hmm, the whole justice/mercy debate I suppose.
On the flipside, I wonder whether Changelings are
encouraged to break the 7th Law, so that they'll be more powerful cannonfodder at the Gates? After all, teach them 6 things, and they are 2 refresh closer to Choosing, and gain +2 on all spells during the fighting. Presumably the Seelie are only in danger if they show talent at healing, and from Unseelie 'recruiters'.