No, never heard of it…
FFX explodes with extra content to make up for the overly linear structure of the main game.
That’s the point that’s being made here; It’s even more linear than FFX, FFX-2, FFXII, or any other “hand holding” RPG to have emerged recently, and it lacks any sort of extra content to boot.
I’m not necessarily complaining, though it would sound like it. Apparently the music and Story are among the best in the franchise. I’d always played FF for the storylines, doing enough side quests to allow me to go over the final boss with relative ease. That’s how I’ve played them since FFVII. If I can get through the game without having to worry about extra stuff to do, I’m okay with it, especially since my game queue continues to grow. However, FF has become known for sidequests as much as it has story and aesthetics. It’s been one of the main things that draw fans to the series, and I can see how they would decry the decision to considerably cut back, while limiting exploration.
But then again, I haven’t played it yet, so I can’t say.
Like you said, JRPGs are pretty linear compared western RPGs, and more and more games have omitted the world map, thus making them more linear, but they’ve for the most part had something extra to keep the player occupied. FFXIII seems to be lacking even that.