Usyks doesn't have many weaknesses. He does have one tho. His style requires unbelievable stamina to be effective. When that goes or starts to slide he,ll be beatable. Watched a few of his fights this week. His gameplan is essentially to tire the opponent out. Get them working harder than they want to be working. He basically does that with a very high level of skill but it takes a lot of energy to carry it out. Getting away with it ATM....but at 31 when that stamina starts to go....it,ll be the beginning of the end for him. A bit like golovkin. When he slid just that little bit stamina wise....he became just about beatable. Same will happen with usyk. Seems about the only weakness in this new eastern European style....relies heavily on very good stamina. Take that away....and the style becomes beatable.
Possible! But it's also possible he has extremely economical movement. That doesn't lead to much wasted energy. Kind of like the best movers with the most economical movement from other sports such as tennis, which has Roger Federer, even at an old age, still being competitive at the highest level and having some success here and there, due to the economy of his movement. Or Lionel Messi from football (American soccer).