yeah I would have dumped that Idea. I would have concentrated on the pyscholigist having mulitiple identities(though not the City Wok chef), and somehow having to battle each of Butter's identities. Really I'm wasting time rewriting their episode in my head, but we all do that.
The multiple identities subplot was intricately tied to the chinese/japanese subplot though, since his therapist was the chinese guy
It would have been hilarious to see Cartman being a sushi snob and making jokes that Kenny's family can't afford Sushi and Kyle not eating it because it's not kosher. I did laugh that neither oriental character could understand the other.