His overall grappling and pace will win him plenty of matches against a lot of black belts, but the guys who know how to play that grip game and can lace him up with it, they'll give him fits. He said it best in his post, he's taking the time to really focus on it so that he can be the best in the world at it, that takes a lot of humility and acceptance that even though he's a multi time champion, he knows that he has to work on this aspect of his BJJ.
I'll say this, after getting tapped twice in no gi by him, I'm sure Keenan Cornelius is LOVING this news