Even then, he did keep himself fairly separate, and considering that his opinion of mages was pretty much exactly the same as when he arrived, the necessity for reeducation would be pretty minimal. He probably would have had some tests and been observed in his 'usual' Beresaad environment - to see if he slipped up and tried to spread any unenlightened views. Popping him into a reeducation center from the outset would actually be more likely to backfire than observation would.