So Michonne got her katana back, but may thereby have lost her chance to reclaim her lost humanity.

Reminds me of a joke he did on "Married with Children". Al's arguing on the phone with someone. You can't hear what the other person is saying, but Al replies: "Listen, you're not insulting me by insulting my wife." Peggy in the background: "What did he say Al?" Al: "Relax, nothing I haven't already said myself."