Kaku was pretty strong but this also shows huge gap of skill between Luffy and Zoro
Kaku is far greater prodigy than Lucci, as he unlocked awakening in merely two years and seem to have insanely strong Haki as well, clashing with Zoro and not getting cut in half.
Kaku is at least equal to Lucci at this point if not stronger
But then Zoro just casually tossed him aside with a nameless attack and looks like Kaku was momentarily K.Oed, looking at his eyes.
yes with a nameless attack Zoro tossed aside an Awakened Zoan who is easily YC1+ as per
@sanjikun
That makes Zoro Yonko level character
He doesn't need his ultimate Joy Boy sperm power up and named attacks to handle Kaku
One nameless attack
Zoro literally Whitebeard vs Aced his way through Kaku fight
Sleep diff and toss him aside with nameless attack