I have been waiting a bit before putting on my tinfoil hat due to the nature of rng drops in general but I have now run well over 600 dread lairs since the last patch in which they nerfed River District SHE seals and legacy nightmare tradebar gear.
Prior to the patch I had roughly a 30-35% drop rate on superior enchanting stones, and I would run on average 50-60 lairs PER day 5 days a week so my sample size was pretty decent. I would also pull atleast 2 Energons a day in the Dread Legion Skirmish while farming Vanguard Scripts for additional lair keys.
After this patch I now have an 8-10% drop rate on superior enchanting stones and am lucky to get 2 Energons in an entire week. I understand rng can vary but at this point its obvious that these were ninja nerfed.
16k+ Combat HR