I don't think its real, lets be honest, if anything, the final fantasy series is probably one of the easiest to fake, especially considering that theres various instances that are repeated for every game, the summons for example, which would be very easy to fake.
Considering that the titan's demo name was featured in a previous Japanese trailer, and that thats the only reasonable contribution to this guys legitimacy, I think this is made up. Through a combination of building on previous interviews, highly predictable final fantasy answers, and telling the demo name to people who mostly can't understand Japanese, it would be pretty easy to do.
Since we're 3.5 months away from release, if these problems really were occurring, we would have had a delay by now, and we would not have received any demos, considering the time they would take to produce, especially considering that they are doing the ATRs' at the same time. These would have been cut straight away if the situation was so dire.
Theres also a full-length CG movie, mobile game, anime series, VR game and a crazy amount of collectibles, Square Enix are going all out for it. If there is any risk of it completely blowing up, they would pulls the reins straight away. Mind you, with the whole FFXIII situation, it doesn't exactly instil me with confidence since the merger.
Still debating whether to pre-order it for the blu-ray movie or wait for reviews.
Also, I wanted to know the reason why Nomura left according to the 'leaker', I would click the spoiler, but on the off-chance that its actually real, I don't want to spoil myself on the other parts of the answer (not that it would be worth it considering some of the other content of the leak).
Can anyone game enough reply it please?