Allow a bow to operate at peak efficiency no matter the weight setting?

It' s always been stated that a bow with the limb bolts maxed out operates at peak efficiency, and backing out the limb bolts to lower draw weight and " adds slop" to the system, and efficiency potentially suffers.

Do pivoting limb pockets, which keep the limbs tight and secure no matter the setting, solve this?

Would a 70-80# draw bow with pivoting limb pockets backed down and set at 70# shoot the same as a 60-70# bow maxed at 70#s? How much brace would one gain with the backed down 70-80# bow over the maxed out at 70#?