Patch 2.4 has been upon as for almost a week now, and that's long enough for Wowhead to have collected reliable data on some of the interesting new things in the patch. Here's what I've noticed, leading off with what is (to my mind) the most interesting piece of information:
- Shattered Sun Supplies have a 10% chance to contain a Badge of Justice
- Wretched Fiends and Wretched Devourers each have a 30% chance to drop Mana Remnants for "Arm the Wards." Though this is probably reduced a bit by players who kill the Wretched without having the quest, I think 30% is close to the true drop rate (based on my own observation).
For comparison, I checked WOWDB and Thottbot. WOWDB gave 9.2% for the Badge, which is similar, and 98% (!) on the Mana Remnants, which is clearly wrong. Thottbot says 9% on the Badge, and 27% on the Remnants.