I would hope that he's implying an update to the game's infrastructure, in order to facilitate future updates. But his vagueness suggests that he's not really even sure what it is, or else he would have just said "an improvement to the game's systems" or something. So, for all I could know, it's just the integration of the cash shop into the game itself, so that players can just directly purchase new mogshop items without having to use a separate browser, or even something as little as being able to turn lights on and off by pressing an in-game switch via an action.