Eh, not that disappointed that Omid and Christa are gone, never really liked them. The only characters in the first game I liked were Lee, Clem, Lily, Carley, Molly, Kenny, and Ben.
I really like this episode, though I wish it were longer. Either way, I couldn't leave the dog to die a slow, painful death. I also fed it. I actually went back and tried all four choices to see if the dog could survive somehow. Doesn't work. I honestly wouldn't put it past Telltale to have some obscure way to do so. Like say, a very specific set of choices from the first game, but also extremely unlikely ones. As well as doing something almost no player would actually do. Namely burning the photo of Lee. Probably not, but it would be cool.
I don't like this new group, with the exceptions of ballcap, possibly-bitten dude, and nice brown-haired guy...yeah, I don't remember their names. I think the doctor was named Carlos? Oh well, I especially don't like the pregnant one. I don't know, everything about her interactions with Clem just scream "I don't like you because you are a female stepping into my territory." Also she apparently cheated on...Alvin, was it? Is he the fat one? I have a very negative view of cheating.
I saved possibly-bitten dude, because he probably isn't actually bitten. And between him and his nephew, I like him more.
Also, yeah. That scene with Clem stitching up her own arm? Really painful to watch.