We do not like to keep track of warping all around either. In fact, we don't. Makes the bookkeeping experience less extreme.
Still the warping thing is making me think that you might get a warping point for each 5 or 10 XP invested in supernatural abilities. It might make for a more controlled warping environment AND make old magi creepier regardless of their flawless magic. And ot will warp those guys that go around looking through illusions or that can dowse for silver and water. Better atonement to the supernatural makes you less mundane at all levels 
Cheers,
Xavi