If they want to do feelings with zombies, they need to take the route of Robert Carlyle's character in 28 Weeks Later in that he was still a zombie, and still consumed by his need to eat and still had all those instincts, but through the film you see him following his family, not attacking them, just watching, almost as if he is watching over them still.
For that reason alone that movie was brillant.
Thats how you do serious zombie emotions. But to be honest the casting already has lost all credibility for me. It looks like something just to draw young teen girls it.
Its what I hate about Robert Pattinson, because hes seen as a "hot guy" but really his mind is fricken incredible, and hes a great person, casting roles and looks aside, because really, looks dont matter (oh and he hates twilight more then anything so that should say something about the movies if the cast hates it)
They need to start chosing people for their acting, and not for the way that they meet a role or a character. Acting will carry over above everything else, a bit like script writing verses aesthetic in that way