I don't like what's happening to Carl - I'm glad that he showed some child-like (even human) emotion at the very end. He's also a favourite so I don't want him to become completely unlikeable.
The stalker aspect was well done, I thought. Cannibalism hasn't really been seen yet, though it makes sense in Kirkman's world, and I'm glad that that was established as a line that shall not be crossed. The gruesome deaths were perhaps unnecessary, but the remorse and disgust shown by Rick was good, I think. He hasn't completely lost it yet.
I wan more Glen and Maggie though!