One word: Boring
I couldn't bear this show after the first episode of season 2. I tried to watch the second episode. Zombies are boring, characters boring. After watching great shows like Games of Thrones this show is not doing it anymore for me. We know nobody of importance is going to die.
Maybe it miss Darabont touch.
These episodes were pretty much written before Darabont was fired IIRC. I think they still represent his vision for the show if that is the case.