Cadillac Records

Today we say in Cadillac records we saw that the producers believed that Muddy Waters needed to change his sound because all of his songs sound the same. Do you believe that Muddy Waters took this as well as we saw in the film or do you believe his reaction was similar to Ray Charles in the film Ray? Also, while changing his sound Muddy Waters, along with his band mates, attempt some new things. Do you believe that he was allowed to because Chess was not a big time producer yet or would Muddy be able to attempt these new things with another record company?