Definitely a set-up episode. A very good setup episode.
I really like Blood here. That little smugness he threw in and the way he reacted to Oliver revealing who he was came across great as a dropping of his mask. I still hope he tries to stroke out on his own. Slade has given him an army, and he's only one betrayal away from using the army's attack as a way to set himself up.
The army's coordinated attack was awesome to behold. And now I'm hoping Roy wakes up in time to save Thea.
I did like Laurel better here. But I still don't think the character is all that cool. She was useful and involved here, but she's still the most stereotypically soapy character out of the cast. Still better to see her portrayed as a positive force, even if I still don't think she's all that great an interpretation of the character.