The ruling only states that costs must be a consideration. If the EPA consideration order is all grey-area and not strictly defined it will be twisted to mean “Ya, we looked at it and considered it and we consider it moot”
or, yes we considered cost, and we know it will put you out of business, tough luck, COMPLY!
You’re right, crazy or creative accounting by government bureaucrats who consider a reduction in the rate of growth a cut essentially gets around this ruling.
Nuclear Regulatory Commission pronouncements need cost benefit, which is cooked typically to favor expansion of their authority.