Obviously you get +14% more health when Stubborn Defiance pops, but the boon also lists "and replenish 1 use now."

Stubborn Defiance doesn't have uses. Its infinite, but only once per room, and you're almost incapable of picking up a boon at a point where you could replenish it (troves are the only situation I could see it: you defy death, pick up the boon, then pop the trove, but still...).

Am I missing something?