Basically the development revolves around the characters, not the history. Its been what? 5 years? And we still have no idea of what caused the disease, we really have no development in terms of the history, it didnt change, they seek a safeplace, they take it, then, it gets dangerous, bad guys come, they kill them, poop blows up and they move, and so on. Back in the 2nd season or something there was this scientist that blew the whole place up with himself inside, thats what im talking about, we need stuff like that. They havent been to DC, we didnt really see anything other than survivors... well, maybe there's all there is.
I'll watch the series anyway, im too addicted not to, but some info on the disease would be more than great.