AFAIK, it wasn't. If I remember right though, they said they were trying to get it into the game, but who knows where that will end up.
Also, I know it can seem ridiculous to witness "meltdowns" over things that seem trivial, like the Regis redesign, but it stems more from the fact that Square Enix has been ripping this bandaid off slowly ever since the re-reveal.
First we get this shot in the arm that not only is Versus XIII, a project thought dead, still alive, but it's now a next-gen title being given the title of a mainline Final Fantasy game. (!)
And then "Oh, Nomura's no longer directing."
And then "Oh, the combat is no longer the fast action system they were going for before."
And then "Oh, the story has been changed."
And then "Oh, Stella is no longer a character"
and so on.
I don't think these things individually or collectively doom the game, by any means, but we keep getting these updates every few months were it's like "Now, it's even less like what you were initially excited about!"