Alright, I guess now that the thread is sorta winding down instead of going at approximately 5 pages a minute, I'd chip in my own two cents. Without getting too far into things I shouldn't be talking about, do remember that Nomura's style during the mid/late 2000s is to make trailers or video pieces on concepts that are freaking cool, and then integrate them into the game's plot later.
In some cases, like the Secret Movies of Kingdom Hearts, it results in some exceptional scenarios and unbelievable levels of hype. If you're not aware, Another Side, Another Story, KH's secret movie was made prior to fleshing out the story of KH2, and Nojima had to write in the quotes present in the trailer after that fact*. Several key details (har har) were changed from that movie to how it was implemented in-game in KH2 and Chain of Memories, e.g. the keyblades involved. (Get it? Keyblade? Key details? Har har)
While The Gathering was obviously more fleshed out, even it had some elements changed by the time it was fleshed out into Birth By Sleep, KH2FM's secret movie, e.g. Xehanort's design.
* "Another side, Another story..." was meant as more of a concept trailer, showing whatever ideas Tetsuya Nomura had for a sequel at the time; it was not meant to be taken as an actual part of the storyline for the games. Kazushige Nojima, the scenario writer, explained that, after the story for Kingdom Hearts II was written, he had to go back and find places to put in the seemingly random quotes found in both "Another side, Another story..." and "Another Side, Another Story [deep dive]".
It is entirely possible that key elements of the Versus XIII trailers might have been changed even if the project had remained as Versus XIII. While Nomura and Nojima undoubtedly would probably have weaved everything, from the party invasion to Stella and her exact characterization as it had been presented, it into their overall narrative, the existence of those scenes, as they were, were not yet indicative that an entire story had already been completely set in stone utilizing those scenes.
I think honestly, this is one of the gifts Nomura and Nojima have - being able to write in his ideas into a narrative that doesn't break under its own weight when taken in small slices e.g. Kingdom Hearts. When a slightly different set of people took the helm, the decision to find ways to include these smaller concept pieces into the overall narrative becomes a harder one, because if not done correctly it will be at the expense of the game itself, and a disservice to Nomura.
Having spoken to multiple staff members over the past year, what I can say that when they are following Nomura's original vision as much as possible, it's not simply just PR speak. They -are- doing all they can to respect the world and characters that Nomura created. Aesthetically, it's still a fantasy based on reality. Noctis still is crown prince of a family of sword summoners. The combat still is based on capitalizing on that fact. It's still an action-based open world Final Fantasy. The game still is at its core a road trip story. Nojima's plot is still largely intact.
I think the way Tabata handled this announcement was spot-on. It needed to be done sooner rather than later, especially as the marketing campaign for the game itself launches next month, and rampant speculation then would have led to a much bigger fallout than the current situation.
I will say that when I myself found out about the changes (can't say how or when, for obvious reasons), I was a little disappointed, having been someone who also followed Versus XIII (and Somnus, omg) since the start, but FFXV at this point should be judged on its own merits, based on everything that has been revealed from E3 2013 onwards, and I've definitely taken to the world, characters, and story.
Writing off the current female characters in the narrative just because they haven't been really focused on in marketing material up to this point, and just because they aren't what was shown in Versus XIII, does the plot of FFXV a disservice. That much I feel comfortable saying.