I think Carol's story arc just needed better scene editing.
For example, her leaving was played til the end of this chapter, with no "obvious" follow up (other than seeing her siting in the porch, cigar + rosary at hand) to tie it with the previous chapter or with her previous decisions.
It does make a sense, if you imagine what's her state of mind at that point - just to later hear that the Saviors are already knocking at Alexandria's door (thus, reinforcing the notion that they are in a never-ending cycle). But for a bombastic show that specializes on graphic display of emotions, her sudden disappearance might feel like a non-sequitur.
Some extra close ups and stuff, would probably have made the moment more "effective".
Especially when she still continued to talk. Horrible.
