Aye. I agree the alluded power gap still remains largely unexplained, but on the other hand, maybe it will be revealed in actual story arcs. Even if we forget the fact he seems to be able forget all damage to his body when it suits him.

Other than that, I think nepotism plays a role there. He's the great shinigami-sama's son, and can do as he pleases, and obviously his old man trusts his skills and power greatly, instead of trying to protect him (but it's that kind of world anyway).