Yeah, as far as I got it (or not) he uses art as a demonstration to derive "higher" concepts. Though to be honest, I could not find any original ideas that could be attributed to Kronman himself. Only ideas of other thinkers whom he labels as born-again pagans, which I take as his agreement with them. I've basically tried to apply the same method (using art and craft as examples), and as you may have noticed, although I'm a fan of Nietzsche (and Spinoza), I'm, like yourself, pretty far from being a stan.
I would say that justification and redeeming are just synonyms for uncovering the meaning. That is, the answers to "why" which we incessantly ask since we were little kids. And here we are basically in the realm of causes and effects (i.e. "why is such and such?" - "because so and so."). So, you may say that the world knows itself through us. The meanings (or justifications) are then sort of solipsistic -- i.e. the meaning of one's existence is one's existence.
As for morality inherent in macro-level causality, it's more an observation than proposition. All systems gravitate toward equilibrium or "lowest energy state". Thus, moral behavior is one which creates further states that require the least amount of energy to keep them stable. And of course, since (each) "I" is identical, it's always the same "I" who has to "deal" with all the states. But as I said, to really appreciate the latter, one has to know oneself.