So a while ago, A mass effect book was released. This book was called Deception, although many fans label it "Derpception'. The reason for that is, in addition to being awful, the book took some pages from ME3s ending and has many aspects that are either completely wrong, incorrect, or out of nowhere. Characters that were gay are suddenly straight, characters with Autism turn their disease on and off, people teleport around and so on and so forth.
Naturally, Bioware isn't content with a story they told being inconsistent, substandard, or bad, so they are of course releasing a new version of the book that fixes these endings. Oh, this version is okay, though, but changing the ending is not - I guess when fans complain about something being awful, they'll change it, but if they say "hey, you already end the game saying there will be DLC, why not include DLC that makes this ending better?" then suddenly that's an insult that Artistic Vision.
Because of course, it's not when it's in book form. No, in that case, it's just "fixing errors", I'm sure, despite the fact that the end to ME3 has many, many provable errors and impossibilities.
What a joke. The argument of "artistic vision" was always a joke, but now that they are literally going one step further than fans even asked, just for the wrong product, it's so ridiculous I can't see anyone still defending this argument.
But of course, I'm sure you will.
Edit: forgot to include a source. http://www.joystiq.com/2012/02/04/bioware-fixing-mass-effect-deception-novel-mistakes-in-future-e/