Yeah Blackbeard have ACoC Haki actually with toei everyone having ACoC now even law did the same toei affect but unfortunately no one saying law hayving ACoC Haki. So Blackbeard used ACoC Haki mix his devil fruit and he couldn't one shot law or even his Crew and no flooder of law Crew even pass out from his Haki . That is disrespect of Blackbeard if toei affection was truly him using ACoC Haki. Blackbeard having CoC haki sure he has. He is the villain of the story but Luffy will could beat him in the end because Blackbeard count on his devil fruit power more and Luffy to his Haki