This is exactly how I feel about the announcement (although I actually enjoyed Cabin in the Woods, personally.) The walkers are *not* what makes The Walking Dead a good show. They're window dressing. What makes the show worth watching is the characters - their drama, their conflicts, and the choices and sacrifices they have to make to survive. The Walking Dead isn't a Zombie show in my opinion, it's a survival drama that just happens to be set in the zombie apocalypse.
At HHN, on the other hand... The Walking Dead haunted houses (and now, an entire street experience, even) are entire attractions based around the single most superficial detail of the entire show. It doesn't carry any of what actually makes the show as successful as it has been; it's just Scareactors in zombie masks, with set piece and prop references scattered around to say, "hey guys, look, it's The Walking Dead, see?"
I'm really disappointed. Did the executives really feel that the TWD maze was successful enough to warrant not only a sequel maze, but devoting the entire street experience to it? I didn't think the TWD street zone got good reviews at all last year.