This was a missed golden opportunity: they could have had Poochie try to pour a roofie down the Headless Horseman's neck and have it spray back up in his face, resulting in the most epic, "Whoa, dude!" moment yet.
Seeing Katrina's Terrible Wig pulled back to expose the lace front made me realize they missed another golden opportunity: When Katrina came to the present and they dressed her in modern clothes, there was no reason not to get her a modern hairstyle "to make you harder to find," and have her lose that Kanekalon eyesore in favor of whatever's under it. If they're sticking to the story that that's Katrina's natural color, they could add a dye job to the story, or color the actress's hair.
If Abbie's wound was mild enough that she was able to fight again so soon, I'm not sure why she and Jenny left the field in the first place, but I *guess* subsequent doeses of shock and adrenaline can do weird things to the body.
I still hold out hope that since Henry claimed Frank's soul for Moloch, that there's some kind of mumbo-jumbo clause to the contract that can bring Frank back to life now that Moloch's dead. Maybe I'm just grabbing at straws, but it wouldn't be the strangest thing that's happened on this show.
All in all, a better finale than I was expecting, given how the last few months have mostly gone.