Just saw episode 3.
It seems a lot of people it's disappointed because it's "too much drama, and not enough zombies".
I think it's balanced the drama and the zombie thing, just like the comic book. Merle Dixon (the guy in the roof) is not in the comic book, so that part of the plot it's the one that keep me intrigued, and I can't wait to see what happens next episode, I bet one of the Dixon brothers will kill the black guy.
And I don't think that the river scene was unnecessary, it shows how even in an apocalyptic scenario, people can't leave their prejudices behind, and that's the whole point of that "rainbow" variety of races on the camp.