What do you think? Krieg said he was a really powerful and famous pirate and he was 1 year at the grandline.
Still he was cheap shotted/beated by Gin and couldn't to anything. his whole crew was "defeated" by a big wave and Mihawk didn't even took him as a danger.
But on the other way he put the fire of Pearl out with an air kick. A feat Sanji hasn't shown so far… As well as footprints in steel.
Was he really that powerful like it was said and if yes why no one recognize Sanji using the same style as the legendary Zeff?
An other thing I tought about. Could it be that he was once a member of the Roger pirates and after the crew dispanded he formed his own crew? And could it be that he was once a Yonkou? "Red hair" "Red Leg"? If the theory is right about the mythical aspect of the yonkou I can see that.