It's nice to have an actual release date. The delay doesn't bother me because I haven't played a KH game since KH2, so it gives me slightly more time to get the PS4 collection(s?) to get up to speed and have maybe some hope of understanding what the hell is happening with the plot of this game.
Watching the trailer, it just occurred to me, since it's been so long since KH2 came out, this'll be the first console game in the series since Disney switched over completely to 3D CG animation for its animated feature films. It's nice to see Frozen, Tangled, Monsters, Inc., and such in in KH, but it is a bit noticeable (at least in things like the Frozen cutscene with Olaf) that graphically the game can't
quite match how the movies look. I'm sure it won't be a big deal or anything while playing it, but it's just interesting that the 3D CG movie to 3D game transition has its own issues that 2D to 3D doesn't have.