Harmony, by definition does not imply balance, simply agreement. Yet in most of my reading here (I've been a lurker for quite a while) people seem to equate Sazed's/Harmony's nature to balance.This seems to me a clever misdirection by Brandon as he has not (to my knowledge) disuaded the notion.
Thank you Kaellok, I have been wrestling with this idea for a while but your post was actually the one that made it click in my head clearly. I doubt that Sazed/Harmony would intervene if things got too bad or too good. After more thought, it seems to me that his intervention would be triggered by Odium disrupting his ability to create and destroy.