Funny, my first thought was she was upset over Mark. Then I realized it was the other guy.
They forgot. They conveniently forget things when they no longer work in the plot.
Not quite so topical this episode, so I enjoyed it much better than the last. Nice seeing Addison back, but damn, Kate Walsh has some facial expressions that really irritate me. I did like her and Meredith bonding over the interns' speculations.
I, too, think they're leading to Amelia and the non-binary doctor getting together. It was too random a scene not to be integral to a future plotline.