From the first round Usyk seemed to be focused on trying to push Dubois back when tried to control the centre of the ring.
It was a professional performance by Usyk and he deserved the win but Dubois did not really get started at all. We did not have an opportunity to see how Usyk would have reacted if he received the same heavy shots from Dubois (that destroyed Joshua).
I suppose that is part of the being a great champion, you stop your opponent from executing their plan while you implement your own to control the fight.
It seemed to me that Usyk was not worried at all about controlling the center of the ring, he simply used his advantage in movement to score points and make Dubois get tired. Dubois could not press Usyk to the ropes or pin him in the corner, since he always easily escaped under Dubois' left hand. In fact, it is not clear at all what Dubois' plan was (if we discard the most obvious theory - he was beaten but got a lot of money), he showed literally nothing (although of course this is Usyk's merit).