It worked awesome!!!!!!! HALLELUJAH
I think the super hot water helped all the bleach and detergent fully react with all the yuckiness, because there were surprisingly few suds in the first rinse, and just the slightest trace in the second rinse. Most of the diapers smelled like nothing at all right out of the wash, and the Sandys (the thickest ones I have) had just a hint of pool water, so very slight chlorine but not at all bleach-y. And they are more stain free than usual, and MUCH softer than usual.
My stash is almost 100% natural fibers, mostly cotton with some bamboo and hemp. This load was about 1/3 Bottombumpers (AIOs with snap in soakers), 1/3 flats, and 1/3 other (hemp prefolds, bamboo and cotton doublers, bamboo and cotton fitteds).
I officially have a new wash routine --- we'll see how it holds up over time!!!