Well, this game was supposed to be his magnum opus. Yet from reports, corporate didn't like his version of the game for whatever reason. However, they didn't dislike so much as to discard it completely. So they eased Tabata into the role of director and slowly pulled the game away from Nomura. Then he got to direct the VII remake without his agreeing to it allegedly. Kinda weird to be in charge of a project suddenly without anyone giving you any forewarning. Maybe they thought that would ease the blow? I'm not really sure. This is all just speculation. All we really know is that Square-Enix does have a history of mismanagement. Outside of that, it's really murky waters. Just slightly fun to speculate.