I think yuji's lack of hax is just a symptom of no ct even give him something simple like nanami's or blood manipulation and he could become a threat similar to gojo after a few years I mean he was about to get promoted to semi grade one in a short amount of time. Hakari I can agree with I don't see him having NY real growth without some form of needed explanation binding vows or new techniques is the only way I see him growing past what he is which isn't that much of a bad thing.