Wonka's setting is hardly more specific than Wish's I would say. It's an unnamed early 20th century-ish European Anymetropolis, and as per the director/co-writer's Paddington adaptations the racial makeup of the cast is rather diverse. But the characters definitely have "big" personalities (as one would expect in a Roald Dahl-inspired story) -- even ones who are quiet (Lottie is surprisingly similar to Bazeema) or don't get a ton of screentime/development manage to be distinctive. That is helpful.