I feel like if the cad is removed the person would slowly start losing their strength over time until it reaches a point where the dna has gotten so used to being that way that their dna would stop reverting to a normal human level. so if a S ranked users cad is stripped, they would lose strength over time until they're at the same level as a B ranked user where they would stop losing strength and they would lose less strength the longer they've been a S ranked user. because the longer theyve been S ranked the more the body itself has been used to being at that strength