Ahh - the goo' ol' 3rd!
Your memory seems reasonable enough! But then again it might have been due to all the reasons for getting rid of all the unreasonable baggage hauled around by the 3rd ed. that the Magic Theory was also changed
(or should I have said raison somwhere? could not find room for it.. or maybe the raison d'etre of 3rd ed reason was the reasonable howlings of the big bad wolf hunting these territories back then)