I absolutely loved it. Yeah, there was little actual plot progression, but much of TWD, even in the comics, is about atmosphere, tension, an all around symbolism. It showed us that while Carl is in fact now a man
capable of survival on his own, it wouldn't be for long; (almost) no one survives for long on their own in this world. I enjoyed the reveal of Michonne's core of insanity (/flashback) and hallucination scenes, showing what small humanity is left in her. She is a complete monster, and one of the only ones that would probably be okay on her own; yet she herself craves comfort in humanity. I really liked that aspect. Carl and Rick are having a tough time surviving
together, and she found a way to do it with relative ease by her lonesome, yet decided on her own to destroy the zombie convoy that was protecting her so that she could go back to those footprints that knew would lead to Rick/Carl and/or other humans (but no doubt guessed that the cowboy-boot prints were one of theirs).
I really liked it and I'm looking forward to the rest of the season as well as a look at the others survival and if Judith survived or if they are going to cop out with an off-screen death for the beh-beh. I enjoy these character-driven episodes that, while not progressing the plot per se, does a lot to develop the characters themselves and progress
their story. Much like CLEAR, this is going to be one of my favorite episodes, no doubt. The slow, crawling tension throughout was absolutely beautiful and so far Gimple is living up to his word in that he'll make the show more like the comics. He's got plenty of leeway to progress the story before the end of the season; I have no problem at all with him taking some time to indulge in the atmospherics of what is The Walking Dead...as in the humans that have survived by becoming something so much worse than a reanimated corpse.
I have a feeling they'll show the other kids with Judith sooner or later, perhaps at the penultimate/season finale episode(s). It'd be a pity to have one of the most innocent characters killed off in such an unemotional, standard fashion. REVEL IN THE DEATH.