I have a mixed feeling about it. I LOVE KOFXIV, but I still think SNK can do much better at this point and I would rather see them move on to other projects, and eventually to KOFXV, on which I would rather see them build their new content. 50 characters is already a huge number, and while a few extra additions would be nice, having full 16 additional characters (17 now with Rock) is a long stretch.
On the other hand, and as I mentioned, I'm having so much fun with the game (just needs minor balance tweaks, some BG improvements, classic costumes, and more soundtrack options) and that list has a number of personal favourites. Also, since they moved to 3D, most of the game's animation resources can be reused for the next game.