Cormoran: I completely disagree with this.
I think people with this complaint have just missed the new type of gameplay TWD has brought about, that is Emotional Gameplay.
It's difficulty lies in the decisions you have to make and requires you to be emotionally invested in the story and characters to shine (which ofcourse requires them to be very well written and acted, it's a very big gamble to be able to hit these out of the park).
I don't see it as undermining gaming, but bringing about an evolution in gaming. To me that's why it's getting all of these accolades. It's not something everyone understands yet, or realises the medium is even capable of (like Roger Ebert for example) but I'm glad that it's something the industry has understood and taken notice of.
Those decisions and such are presented like cutscenes though, in a movie-like fashion. It's not presented as a game, as interactive, it's like a DVD menu choosing which scene to play.
Think about Half Life 2. It's story is told in a fully interactive way, most of it not even spoken but more experienced. Think of an older Western RPG, which presented it's story through discovery and flexible dialogue and offered choice through action without railroad signs.
Walking Dead is an interactive movie. And that's fine, I would probably even enjoy it. It's not progressing gaming storytelling though, it's killing it.