Some slight adjustments were made to the bosses. Here's how it will work from now on:
* All bosses on normal now have the dauntless champion trait.
* Dauntless has been changed from 75% fear & stun reduction to 50% (so actually less powerful)
* Bosses' innate stun/fear reduction by 25% was removed.
TLDR? This mean? It means all bosses now have 50% fear and stun duration reduction. In my experience the bosses did feel harder to me because it is harder to lock them down. That extra 25% duration makes a big difference.
When I get around to it, bosses will also get a 2nd and 3rd trait in nightmare and hell. For example fire enchanted, cold enchanted, lightning enchanted, multiple pets summoned at intervals, conviction aura, lamprey, vampiric, crippling aura are all probably boss traits. Just some fun ideas.
But don't let all of this worry you because the new items are sick
Edit: Also, dragon breath attacks now last longer.