How did Kira know where Josuke & Okuyasu live (and thus do the annoying "five anime minutes countdown" - which was a bit too "anime" even for my tastes)? How does he know anything about Yukako and Aya? Those really bugged me as Kira seemed to know things he had no business knowing. That aside, the dude got his shit pushed in and it couldn't happen to a better man. Not surprising he escaped here as the narrative didn't really build up to a proper conclusion just yet.
I also now know why there are two people who have Killer Queen. That was something that always confused me about the Jojo spoilers I had seen in the past but the "Face Off" situation explains it. I'm guess this is the only real reason Aya even exists as a character.