Readability is part of the feel
Cel-shading is not just a surface treatment. The edge between rider, track and background has to stay legible at speed, otherwise the visual style works against the movement.
The current direction keeps the palette simple and uses contrast to make landings, lips and route choices readable before the player has memorised the course.
The next test
The next build is about the landing: how quickly the player understands a clean touch-down, how much forgiveness is useful and where style should come from the player rather than an animation that plays automatically.