It's weird that no one addressed the fact that the big 'victory' moment of this episode was when… The Flash killed a teenager.

"We know she’s bad because Demi Lovato’s “Confident” plays in a club while she’s wearing a black outfit."

"Surely a half-dozen Kryptonians could have taken over Earth long ago?"
Superman defeated an entire army of Kryptonians in Man of Steel, so maybe not.

I can't believe you didn't mention how adorable/hilarious the close-up of Aida and Crosby just staring at each other was.