This is basically it. If it wasn't for the fact DPC needs to justify to themselves the rather pointless Interlude then Zoey's affinity would probably just be a choice in a flashback of how Fuckface remembers her.It's just a shortcut to set her affinity, this being the most extreme and obvious choice of the Interlude. As for whether or not Zoey being a DIK or CHICK will matter in any significant way, that remains to be seen.