I thought it was a fantastically executed episode that was diminished some by the lazy writing. Morgans story arc has been butchered so badly that they leave him being unable to decide whether he's Ghandi or Richard Longshanks. Him going over the edge should hav been one of the more impactful events on the 7 seasons of the show. As it is, the actor continues to milk every ounce of goodness that he can from a situation where he's hamstrung by comic book junkies that don't know the first thing about writing TV. The whole mirror images thing with Carol hasn't worked either, because you'd have to ignore seasons 1-5 to believe any of Carol in season 7.
But bravo to the acting, it was tremendous all the way around. And that asshole that shot the kid had better get himself some Colonel Crawford type shit, pronto