KHIII and VII Remake were largely announced to get fans back on board with the company after the disastrous XIV 1.0 and the major change-up with XV's development that angered a lot of people.

The other issue is that while Tabata and Yoshi-P were pretty good about having a dialogue with fans, Nomura and Kitase feel more old school and neglectful concerning it, so it's little wonder that Mr. "Let's announce and never speak of it again except behind closed doors" Nomura is being a bit tight lipped about KHIII. I mean the man largely ignored KHIII and Versus XIII for ten years, is anyone really surprised that now that he's working on it, he's changed? Technically we've been getting some good info about the game and at least actual gameplay videos, so baby steps in a right direction. In truth, SE has done a better job keeping fans informed in the last five years than they did in the years prior to that, and it's mostly due to younger blood coming in and being put in charge of certain projects.

As for engaging in social media, I don't know, I'd rather have something more substantial. Having SE be like "Happy Anniversary" on Twitter isn't really as important to me as having them announce a new game or a release date for something I'm interested. While I can agree that SE has an odd split personality concerning engaging fans with social media, I wouldn't be surprised if a lot of it has more to do with a generational gap and an interest in new technology. Kitase and Nomura don't strike me as the types to use social media like Kojima or Sakaguchi do, who are both well known for jumping onto new tech trends. SE likely feels they've shown enough and will probably show more at some future event they planned out that won't have to compete with every other game on the market like at E3 or TGS.