About frenzy flame and death blight

Okay so it's been over 2 years now and it's a massive shame they didn't do anything with frenzy flame or death blight. I understand that it would be quite hard to probably balance there gimmicks to bosses and what not but maybe they could of did like a knock off version for the bosses if you get me? Like for example Death blight kills any player instantly once it procs but instead of it doing that to bosses. Why not reuse the animation of when the death blight roots hoist you up into the air and make it like a long stagger for them instead of instant death And for frenzy flame why not like make it a unique rebuff like after it procs a frenzy flame will permanently do damage over time, but obviously let it do not so much damage to make it fair or something. Ik these aint the best things to probably implement but man it just sucks not being able to use death blight in pve. Looks so cool man. If you got any ideas please be my guest and discuss away