How to fix Zenos one dimentional character

[Kesey]

Zenos serves the same function as the Joker does in the Batman series, a foil.

I just want to clarify the Zenos is foil theory.

The setup shows that Zenos is a foil, but that only comes to fruition if the interaction with Zenos actually causes the WOL to change their behavior when they recognize the similarity. As a literary term this can only analyzed properly from the end of the story.

Until that is achieved, its only setup to be that way and may not go that way at all. So until we get the fight Zenos is jonesing for and it fundamentally changes the WOL they aren't "foiled" yet.