So Sue is finally back, and it looks like she'll be around for a while (with Ralph being conveniently "busy" somewhere else). I'm so sick of the cliche of easily circumvented laser security grids (nobody actually uses lasers in security systems, precisely because they are so easy to get around), but this was entertaining because of the way they poked fun at the cliche by turning it into a dance -- and because Natalie Dreyfuss looked really sexy doing it. Also, it looked like they did it with genuine lasers rather than VFX, which was a nice bit of on-set choreography.
Sue referenced the DeMatteis Academy of Dance, no doubt a nod to prolific comics/animation writer J.M. DeMatteis, though I'm not sure why they name-dropped him specifically. Anyway, Ms. Dreyfuss mispronounced his name. I was introduced to him at NY Comic-Con once (by Keith DeCandido, I think), and as I recall, his name is pronounced "De-Matt-iss."
Anyway, they've finally followed up on the Psycho-Pirate cameo in Elseworlds, but not in the way I was hoping. They used him to set up the Crisis, implying that he had a connection to the Monitor like in the comics, but then they just dropped that. I was hoping that the mask's return here would have some kind of a Crisis tie-in, maybe as a way of revealing to Team Flash that the multiverse still exists. But no, it was just an evil mask (that seemed to work like the Helm of Nabu, with a consciousness possessing its wearers).