Well his sword reflexes are intensely fast. Slicing through the barriers would be no sweat, with his perception and vision as the main perks. He would face Unalaq in close combat then.
Well I never said Unalaq would stand still. Kinda in the first cause I was not thinking through. As you said, they'll go all out with their powers. So this 'supercharged' form of Kokushibo would do the thing, ya think so?
Depends on the verse. For example think about marvel and all universe destroyer things there. Tanjiro Deku Yuji Luffy Boruto none of them are op yet. Aang is just comparatively weak.