At a base level, Kusoru can also block at Wong levels or better. It's not just the tech, it's his fundamentals too. He understands the game, when to apply pressure, etc. better than most players in the US. He exploited others' frustration and attempts to take risks in desperation.
I can't call him the best cause we have so little to work off of, and thus can't call him consistent either. But he is definitely a threat, and is making lazy Marvel players take notice and put their iron forged tier lists on blast. If only other pros were willing to experiment themselves rather than YT and follow what is said to work. EDIT: Dahbomb beat me to it.