Well, I think it's obvious that pain and suffering aren't negligible. The question is whether they somehow pale into significance when we contemplate nature's divine grandeur. Is the pantheist's proper attitude towards nature one of joy or gratefulness, or should pantheism be joined with an existential rebellion? I suspect that Kronman would say pantheism is the antidote for that rebellion and for existential suffering. Maybe he'd say our rebellion against nature is just nature's way of reaching some vindication for living things, as you suggest. That would amount to a debate between dualistic and monistic interpretations.