To be fair on the author he claims to have not read Day of the Triffids nor seen 28 Days Later at the time the book was written. Is he telling the truth? Who knows?!
I think the develpoment will come, but it may take a while. Kirkman's aim is to show "what happened next" in regards to the zombie genre. Whether he succeeds or not, well... we'll just have to wait and see.
Nothing happened? I dunno, I disagree with that. I think a lot happened, the whole thing took place over a few days (apart from the pre-hospital bit) and saw the end of the world as we know it, the lead character finding himself emerged in this new reality, finding his family and facing the consequences of this new frighteneing world. Remember this is essentially just episode one. It's only the "origin" story and there's a long way to go yet!
Same with character development. In just one episode we've seen the character go from being a smalltown cop that's never fired his gun before to a man that's had to change his whole outlook on life. Who's world has been turned upside down, and whose friendships and relationships to his loved ones is put into question, and the way he's had to adapt and learn very quickly to survive this new world. He's come from being a quiet, decent, "backseat" kinda guy and had leadership and responsiblilty he doesn't really want thrust upon him. The guy at the end of the book is a different person to the one who drew his gun on page 1.
As for the "seven year olds making choices to kill real living people " comment. Well he isn't is he? He's making the choice to protect himself from walking dead people that will eat him if they get close enough. This is the (only) social commentary so far, true... that the ideals and morals of our society cannot be maintained in this new world... or can they?
I do think you're seeing something that isn't there regarding giving the child a gun. There is no license to kill. It's pure protection, and agaist people that are already dead, not "real living people"!
Maybe things will end badly, but I do know that if I were in the same situatiion, I would want my loved ones protected. Maybe it will prove to be a wrong move, but I can understand the motives of the character, and it's not like they have just given him a gun and said "point that wherever you like!. They have introduced a training regime into the equation.
Like I said, i've read another half a dozen episodes from here and there is more to come, both regarding the changes in the world but also the changes in the outlook of the characters involved and the hard decisions they have to make in the face of this new, horrific world they've found themselves in.
I'm not saying you should like it Paul, I genuinely mean it when I say each to there own, but I do disagree with some of your reasons for not doing so.
Alan!