Saga.This doesn't exactly answer your question but from what I understand when it comes to boot production you can only really change up the style (meaning shape and and look, not color) of a boot maybe once a decade.
It's actually the opposite- color is easy to change, the shape/industrial design is the hard part. The former isn't linked to a mold construction, but the latter is and is therefore something boot brands want to avoid doing because of the massive investment involved in doing so (changing the shape of the last or outer mold is anywhere from 5,000-15,000€ per size).
Ultimately, if a rider doesn't get along with the gear, they don't stay with the brand for very long. Some athletes need lots of work to get them happy, some don't need any at all- but the key is making them happy with their gear. You just can't throw a bunch of money at an athlete and make their boot problems go away. At the end of the day, they have to love their boots and if that can't happen, they usually find another sponsor.