It was a marketing survey, not a development survey. They use marketing surveys to determine what aspects of the game to market, not what aspects of the game to keep or ditch. Whatever is in a marketing survey is already locked down because they're already trying to decide if it's worth marketing to sell the game. Everything in the Inquisition survey was in the game because that's how marketing surveys work.
Fair enough. Still not everything in the leak is "confirmed". So far, it has shown itself to be reliable. It's unlikely someone would have accurately guess the setting (almost verbatim).
But consider this:
Chris Schlerf was announced as the lead writer in November of last year. If you go to that BioWare blog entry now, you'll see his name and image are GONE. POOF! Like he never was announced. Why? Why would they go back to an old blog entry and do that?
June 2015: http://web.archive.o...xt-mass-effect/
now: http://blog.bioware....xt-mass-effect/
I can think of two examples where a lead writer left a project and the game was seriously revised:
1) Amy Henning left Naughty Dog. Neil Druckman and Bruce Straley took over, scrapped 8 months of work and started over.
http://www.polygon.c...uckmann-straley
"We had shot eight months of her story, and it was all thrown away". - Nolan North ("Nathan Drake").
2) When Joe Staten left Bungie, the entire story for Destiny was significantly changed.
http://za.ign.com/de...y-changed-subst
"Although Destiny was planned for release in September 2013, the story was substantially revised beginning August 2013" - Court documents. Incidentally, August 2013 is when Joe Staten left Bungie.
So, as far as I'm concerned, until details are made public then everything is subject to change, especially when I see signs of trouble.