Can he cut a man in half and save his life?
He would have cut Luffy's arms off if he stretched it.
Oda literally showed it to us
Zoro who is far inferior to Mihawk was able to cut a dragon more durable than Jinbei as Haki G2 attack was not even able to bruise it.
Summoning Meteorites? Who gives a shit if he can't when he can cut Island sized meteorites like butter
He can definitely make Tsunamis and Tornados with his swordsmanship
Since he is peak of swordsmanship in One piece, he should be able to cut any elements like fire, water, wind, sand etc
His CoO is so strong that he can fight an all out commander without even looking at him nor focus on him mentally
He even has sniping CoO which Sanji and Usopp has
But all these feats are just his casual feats before CoO was even fleshed out