But why is it a *must* that Shanks has some power that propels him past Mihawk?
Doesn't it make more sense that both Mihawk & Shanks got stronger over time, yet due to Shanks no longer having his arm, he naturally fell slightly behind?
IMO, the only way to argue Shanks > Mihawk is either by believing that Shanks isn't a swordsman or by believing that Mihawk's title is fraudulent. There really should not be any in-between nonsense such as, "Mihawk would win in a swordfight, but in an 'anything-goes' scenario, Shanks wins."