While this change in mage spec might seem an oddity and not necessarily important, it does serve to illustrate an key fact: balance changes can and do work. All these small changes to the way that the game is played, be it through small hotfixes or modifications to the encounter designs; these changes eventually lead to an equalization of spec and greater player choice.
Of course in a perfect world these minor changes wouldn't be necessary to correct major deficiencies. But, given that the game is so fluid and changes are a natural part of WoW these days, it's encouraging to see that they have the desired effect.
Is there a method to Ghostcrawler's and his team's madness? Yes, and it appears to be working.