I actually didn't like Kenny... right up until what he did. That made the character for me. Before that I had him written of as a selfish prick who cared about himself first, family second, and everyone else was disposable. But what he did really showed just how far he had gone. It was extremely well done, I thought. As for Clem I think that if she does need to be on her own she'll survive at least for awhile. I don't know how well a kid her age could really survive something like that, but I like to think Lee prepared her fairly well. Besides, I think those 2 figures from the after-credits scene will find her. Maybe it'll turn out to be Omid and Krista or w/e their names were (I didn't like them. At least, didn't know enough about them to care.) so we'll see.
I think my only complaint so far was that the walkie guy is still pissed at you whether or not you chose to take the stuff or not. It seemed too forced to me. He has it out for Clem and Lee no matter what. I get why they did it, but with how short this episode was it would have been nice to see more variation. Maybe different walkie guys depending on earlier choices. Hell, have one where it turned out to be one of the brothers again or something.