I don't think I've ever used an exclamation point in a headline before, but this deserves it. It appears that Paladins' Retribution tree will be getting some passive threat reduction, as of patch 2.3. Posted just recently in the official forums by Eyonix:
After further patch testing and some serious discussion, we've decided to add threat reduction deep in the paladin's retribution tree. As a result, fanaticism will now reduce threat caused by all actions by 6/12/18/24/30%, in addition to its current effect of course.
How does that sound? 30% passive threat retribution seems pretty darned solid to me. Let's hear it for Blizzard -- looks like they do listen to what their customers want after all.