please update his technique, give him better offense and defense because you really made the evil fragments op, I mean absorbing CE, nullifying techniques it's too much for a mere byakugan
HByakugan isn't his main technique. It's just for tracking and see-through. His domain is what makes him special. If I make him overly OP then all the fights would be resolved in two paragraphs.
I suggest you give him a technique that increases his physical abilities the longer he fights and when using this technique, his attacks ignore defense and can resist cursed technique