This seems to be the number one complaint I have read online for C&C. I like the concept of the prime attributes but I do see how many folks dislike the prime/non-prime vs challenge level mechanic. It is a bit bizarre for old school. It is easily modified however. I am using it as written for the time being but I have put some thought into simplifying it.While C&C did many things right, I never git happy with the prime attributes and the method of calculating target numbers in addition to calculating the modifier to the dice roll.