With Nomura stating he's had the concept of Quadratum in his mind since the first game (which I'm highly doubtful of), do you think the gazing eyes on keyblades* like Void Gear are going to be explained away at some point, as if Nomura had been cooking up that concept ever since it was first introduced? Are they all the Master of Masters' doing? If so, does that mean they're all magical artifacts rather than his actual eye, as implied by when he first bestows No Name unto Luxu?
To me, they're just nice "evil" design indicators, but one does wonder.
*I mean the eyes on the actual keys, not the keychains, since there are a handful of those.